Common Weakness Enumeration

CWE-119

Discouraged

Improper Restriction of Operations within the Bounds of a Memory Buffer

Abstraction: Class · Status: Stable

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

2949 vulnerabilities reference this CWE, most recent first.

CVE-2026-122146 (GCVE-0-2026-122146)

Vulnerability from cvelistv5 – Published: 2026-11-05 00:45 – Updated: 2026-11-05 20:32
VLAI
Title
101arrowz fflate index.mjs unzipSync memory corruption
Summary
A weakness has been identified in 101arrowz fflate up to 0.8.3. This issue affects the function unzipSync of the file esm/index.mjs. This manipulation causes memory corruption. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 20:31 UTC
CWE
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/431150 vdb-entrytechnical-description
https://vuldb.com/vuln/431150/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-122146 third-party-advisory
https://vuldb.com/submit/1027352 third-party-advisory
https://github.com/ictrun/java/issues/9 exploitissue-tracking
Impacted products
Vendor Product Version
101arrowz fflate Affected: 0.8.0
Affected: 0.8.1
Affected: 0.8.2
Affected: 0.8.3
    cpe:2.3:a:101arrowz:fflate:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-121617 (GCVE-0-2026-121617)

Vulnerability from cvelistv5 – Published: 2026-11-04 02:45 – Updated: 2026-11-09 16:14 Unsupported When Assigned
VLAI
Title
Linksys E5600 Header upload_fw.cgi init_multipart out-of-bounds write
Summary
A security flaw has been discovered in Linksys E5600 1.1.0.26. Affected by this issue is the function init_multipart of the file /cgi-bin/upload_fw.cgi of the component Header Parser. The manipulation results in out-of-bounds write. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 16:13 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
Linksys E5600 Affected: 1.1.0.26
    cpe:2.3:o:linksys:e5600_firmware:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-121616 (GCVE-0-2026-121616)

Vulnerability from cvelistv5 – Published: 2026-11-04 02:30 – Updated: 2026-11-09 16:13 Unsupported When Assigned
VLAI
Title
Linksys E5600 JSON Request mesh_login.cgi strcpy out-of-bounds write
Summary
A vulnerability was identified in Linksys E5600 1.1.0.26. Affected by this vulnerability is the function strcpy of the file /cgi-bin/mesh_login.cgi of the component JSON Request Parser. The manipulation of the argument username/password/token/source/cn/action leads to out-of-bounds write. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 16:12 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
Linksys E5600 Affected: 1.1.0.26
    cpe:2.3:o:linksys:e5600_firmware:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-121600 (GCVE-0-2026-121600)

Vulnerability from cvelistv5 – Published: 2026-11-04 00:45 – Updated: 2026-11-09 15:59
VLAI
Title
TOTOLINK A950RG MAC Filter cstecgi.cgi setMacFilterRules stack-based overflow
Summary
A flaw has been found in TOTOLINK A950RG 4.1.2cu.5268_B20221104. Affected by this vulnerability is the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component MAC Filter Handler. This manipulation of the argument addEffect causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been published and may be used.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 15:58 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
TOTOLINK A950RG Affected: 4.1.2cu.5268_B20221104
    cpe:2.3:o:totolink:a950rg_firmware:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-121599 (GCVE-0-2026-121599)

Vulnerability from cvelistv5 – Published: 2026-11-04 00:30 – Updated: 2026-11-07 03:40
VLAI
Title
TOTOLINK A950RG Multi-SSID Configuration cstecgi.cgi delWiFiMultipleConfig stack-based overflow
Summary
A vulnerability was detected in TOTOLINK A950RG 4.1.2cu.5268_B20221104. Affected is the function setWiFiMultipleConfig/delWiFiMultipleConfig of the file /cgi-bin/cstecgi.cgi of the component Multi-SSID Configuration. The manipulation of the argument wepkey2/wepkey3 results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-07 03:39 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
TOTOLINK A950RG Affected: 4.1.2cu.5268_B20221104
    cpe:2.3:o:totolink:a950rg_firmware:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-121598 (GCVE-0-2026-121598)

Vulnerability from cvelistv5 – Published: 2026-11-04 00:15 – Updated: 2026-11-04 18:59
VLAI
Title
TOTOLINK A950RG Basic Wireless Configuration cstecgi.cgi strcpy stack-based overflow
Summary
A security vulnerability has been detected in TOTOLINK A950RG 4.1.2cu.5268_B20221104. This impacts the function strcpy of the file /cgi-bin/cstecgi.cgi of the component Basic Wireless Configuration Handler. The manipulation of the argument wepkey leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 18:59 UTC
CWE
Assigner
VulDB CNA
References
Impacted products
Vendor Product Version
TOTOLINK A950RG Affected: 4.1.2cu.5268_B20221104
    cpe:2.3:o:totolink:a950rg_firmware:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-121597 (GCVE-0-2026-121597)

Vulnerability from cvelistv5 – Published: 2026-11-04 00:00 – Updated: 2026-11-09 17:00
VLAI
Title
TOTOLINK A950RG Easy Setup Wizard cstecgi.cgi setAppEasyWizardConfig stack-based overflow
Summary
A weakness has been identified in TOTOLINK A950RG 4.1.2cu.5268_B20221104. This affects the function setAppEasyWizardConfig of the file /cgi-bin/cstecgi.cgi of the component Easy Setup Wizard Handler. Executing a manipulation of the argument functionType can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 16:36 UTC
CWE
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/430439 vdb-entrytechnical-description
https://vuldb.com/vuln/430439/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-121597 third-party-advisory
https://vuldb.com/submit/1022558 third-party-advisory
https://gist.github.com/H3rmesk1t/49d6ccded593796… exploit
https://www.totolink.net/ broken-linkproduct
Impacted products
Vendor Product Version
TOTOLINK A950RG Affected: 4.1.2cu.5268_B20221104
    cpe:2.3:o:totolink:a950rg_firmware:*:*:*:*:*:*:*:*
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Show details on NVD website

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CVE-2026-121517 (GCVE-0-2026-121517)

Vulnerability from cvelistv5 – Published: 2026-11-03 21:00 – Updated: 2026-11-07 03:35 X_Freeware
VLAI
Title
IrfanView TIFF Wang Annotation heap-based overflow
Summary
A vulnerability was detected in IrfanView 4.76.0.0 on Win64. Affected by this vulnerability is an unknown functionality of the component TIFF Wang Annotation Handler. Performing a manipulation results in heap-based buffer overflow. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit is now public and may be used. It is recommended to apply a patch to fix this issue. The vendor confirms: "[T]he TIF-Annotations option is OFF by default. Means, normal users are not affected ... the danger level for this is low".
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-07 03:34 UTC
CWE
Assigner
VulDB CNA
Impacted products
Vendor Product Version
n/a IrfanView Affected: 4.76.0.0
    cpe:2.3:a:irfanview:irfanview:*:*:*:*:*:*:*:*
Show details on NVD website

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CVE-2026-120337 (GCVE-0-2026-120337)

Vulnerability from cvelistv5 – Published: 2026-11-02 03:30 – Updated: 2026-11-06 19:19
VLAI
Title
VStarcam O-KAM SuperIPCam P2P Session Teardown SuperIPCam.exe FUN_005a2d44 use after free
Summary
A vulnerability was determined in VStarcam O-KAM SuperIPCam 1.3.3.32. Affected by this issue is the function FUN_005a2d44 of the file SuperIPCam.exe of the component P2P Session Teardown. This manipulation causes use after free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 19:19 UTC
CWE
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/429662 vdb-entrytechnical-description
https://vuldb.com/vuln/429662/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-120337 third-party-advisory
https://vuldb.com/submit/1016302 third-party-advisory
https://gist.github.com/Ishanoshada/cb73d61f792c7… exploit
Impacted products
Vendor Product Version
VStarcam O-KAM SuperIPCam Affected: 1.3.3.32
    cpe:2.3:a:vstarcam:o-kam_superipcam:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-120336 (GCVE-0-2026-120336)

Vulnerability from cvelistv5 – Published: 2026-11-02 03:15 – Updated: 2026-11-05 16:03
VLAI
Title
VStarcam O-KAM Client DevDll_925.dll FUN_10003EA0 stack-based overflow
Summary
A vulnerability was found in VStarcam O-KAM Client 1.3.3.32. Affected by this vulnerability is the function FUN_10003EA0 in the library DevDll_925.dll. The manipulation results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 16:03 UTC
CWE
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/429661 vdb-entrytechnical-description
https://vuldb.com/vuln/429661/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-120336 third-party-advisory
https://vuldb.com/submit/1016301 third-party-advisory
https://gist.github.com/Ishanoshada/f6345a42a46e1… exploit
Impacted products
Vendor Product Version
VStarcam O-KAM Client Affected: 1.3.3.32
    cpe:2.3:a:vstarcam:o-kam_client:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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Mitigation MIT-3
Requirements

Strategy: Language Selection

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
  • For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer.
  • Be wary that a language's interface to native code may still be subject to overflows, even if the language itself is theoretically safe.
Mitigation MIT-4.1
Architecture and Design

Strategy: Libraries or Frameworks

  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
  • Examples include the Safe C String Library (SafeStr) by Messier and Viega [REF-57], and the Strsafe.h library from Microsoft [REF-56]. These libraries provide safer versions of overflow-prone string-handling functions.
Mitigation MIT-10
Operation Build and Compilation

Strategy: Environment Hardening

  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
  • D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
Mitigation MIT-9
Implementation
  • Consider adhering to the following rules when allocating and managing an application's memory:
  • Double check that the buffer is as large as specified.
  • When using functions that accept a number of bytes to copy, such as strncpy(), be aware that if the destination buffer size is equal to the source buffer size, it may not NULL-terminate the string.
  • Check buffer boundaries if accessing the buffer in a loop and make sure there is no danger of writing past the allocated space.
  • If necessary, truncate all input strings to a reasonable length before passing them to the copy and concatenation functions.
Mitigation MIT-11
Operation Build and Compilation

Strategy: Environment Hardening

  • Run or compile the software using features or extensions that randomly arrange the positions of a program's executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
  • Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as "rebasing" (for Windows) and "prelinking" (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
  • For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].
Mitigation MIT-12
Operation

Strategy: Environment Hardening

  • Use a CPU and operating system that offers Data Execution Protection (using hardware NX or XD bits) or the equivalent techniques that simulate this feature in software, such as PaX [REF-60] [REF-61]. These techniques ensure that any instruction executed is exclusively at a memory address that is part of the code segment.
  • For more information on these techniques see D3-PSEP (Process Segment Execution Prevention) from D3FEND [REF-1336].
Mitigation MIT-13
Implementation

Replace unbounded copy functions with analogous functions that support length arguments, such as strcpy with strncpy. Create these if they are not available.

CAPEC-10: Buffer Overflow via Environment Variables

This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the adversary finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.

CAPEC-100: Overflow Buffers

Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an adversary. As a consequence, an adversary is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the adversaries' choice.

CAPEC-123: Buffer Manipulation

An adversary manipulates an application's interaction with a buffer in an attempt to read or modify data they shouldn't have access to. Buffer attacks are distinguished in that it is the buffer space itself that is the target of the attack rather than any code responsible for interpreting the content of the buffer. In virtually all buffer attacks the content that is placed in the buffer is immaterial. Instead, most buffer attacks involve retrieving or providing more input than can be stored in the allocated buffer, resulting in the reading or overwriting of other unintended program memory.

CAPEC-14: Client-side Injection-induced Buffer Overflow

This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service. This hostile service is created to deliver the correct content to the client software. For example, if the client-side application is a browser, the service will host a webpage that the browser loads.

CAPEC-24: Filter Failure through Buffer Overflow

In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).

CAPEC-42: MIME Conversion

An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

CAPEC-44: Overflow Binary Resource File

An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the adversary access to the execution stack and execute arbitrary code in the target process.

CAPEC-45: Buffer Overflow via Symbolic Links

This type of attack leverages the use of symbolic links to cause buffer overflows. An adversary can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.

CAPEC-46: Overflow Variables and Tags

This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The adversary crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.

CAPEC-47: Buffer Overflow via Parameter Expansion

In this attack, the target software is given input that the adversary knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.

CAPEC-8: Buffer Overflow in an API Call

This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An adversary who has knowledge of known vulnerable libraries or shared code can easily target software that makes use of these libraries. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.

CAPEC-9: Buffer Overflow in Local Command-Line Utilities

This attack targets command-line utilities available in a number of shells. An adversary can leverage a vulnerability found in a command-line utility to escalate privilege to root.