Common Weakness Enumeration

CWE-457

Allowed

Use of Uninitialized Variable

Abstraction: Variant · Status: Draft

API response cwe.mitre.org

The code uses a variable that has not been initialized, leading to unpredictable or unintended results.

141 vulnerabilities reference this CWE, most recent first.

CVE-2026-103436 (GCVE-0-2026-103436)

Vulnerability from cvelistv5 – Published: 2026-09-30 15:38 – Updated: 2026-10-02 16:20
VLAI
Summary
apcupsd through 3.14.14 discloses uninitialized stack memory in getupsvar() in src/cgi/upsfetch.c (used by upsstats.cgi, multimon.cgi, and upsfstats.cgi. On the single-field path, when the matched STATUS line has fewer than three whitespace-separated tokens, sscanf("%*s %*s %s", answer) performs no assignment but the function returns success, and thus the caller prints the uninitialized destination buffer into the HTTP response.
Severity
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 16:20 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
Assigner
mitre CNA
References
Impacted products
Vendor Product Version
apcupsd apcupsd Affected: 0 , ≤ 3.14.14 (semver)
    cpe:2.3:a:apcupsd:apcupsd:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
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CVE-2026-102717 (GCVE-0-2026-102717)

Vulnerability from cvelistv5 – Published: 2026-09-30 14:31 – Updated: 2026-09-30 20:00
VLAI
Title
MQTT WebSocket setter ABI mismatch may disclose memory or cause a crash
Summary
MQTT WebSocket setter ABI mismatch may disclose memory or cause a crash
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:59 UTC
CWE
  • CWE-125 - Out-of-bounds Read
  • CWE-457 - Use of Uninitialized Variable
Assigner
eclipse CNA
References
Impacted products
Vendor Product Version
Eclipse Foundation NetX Duo Affected: 6.4.4 , ≤ 6.5.1.202602 (semver)
Unaffected: 6.5.2.202603
Create a notification for this product.
Credits
fdesbiens
Show details on NVD website
To clipboard 

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CVE-2026-94018 (GCVE-0-2026-94018)

Vulnerability from cvelistv5 – Published: 2026-10-20 15:10 – Updated: 2026-10-20 17:03
VLAI
Title
NetX Duo Web HTTP server releases an uninitialized packet pointer on the PUT Content-Length underflow path
Summary
The Web add-on's HTTP server dereferences and releases an uninitialized pointer when it detects a `Content-Length` underflow while processing a `PUT` request. The condition is reachable by an unauthenticated remote client with a single malformed request.
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 17:03 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
  • CWE-824 - Access of Uninitialized Pointer
Assigner
eclipse CNA
References
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse ThreadX - NetX Duo Affected: 6.4.2 , ≤ 6.5.1.202602 (semver)
Unaffected: 6.5.2.202603
Create a notification for this product.
Credits
Yves57
Show details on NVD website
To clipboard 

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CVE-2026-92449 (GCVE-0-2026-92449)

Vulnerability from cvelistv5 – Published: 2026-10-20 14:51 – Updated: 2026-10-20 15:27
VLAI
Title
Binary resource loader: unbounded map_id from a theme file causes a heap out-of-bounds write in the GUIX-allocated arena
Summary
`_gx_binres_pixelmap_table_load()` in the GUIX binary resource (theme) loader indexes the pixelmap table with a value read verbatim from the resource file and never bounds it against the table size. A crafted theme drives a write of up to roughly 256 KB past the end of the table. The overflowed buffer is allocated by GUIX itself, through `_gx_system_memory_allocator`, rather than supplied by the caller, so the loader corrupts its own arena. The public API `gx_binres_theme_load()` takes no size parameter, so no amount of caller diligence prevents this. Reproduces in the shipped default configuration; `GX_BINARY_RESOURCE_SUPPORT` is enabled by default.
Severity
6.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 15:27 UTC
CWE
  • CWE-129 - Improper Validation of Array Index
  • CWE-457 - Use of Uninitialized Variable
  • CWE-787 - Out-of-bounds Write
Assigner
eclipse CNA
References
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse ThreadX - GUIX Affected: 6.3.0 , ≤ 6.5.1.202602a (semver)
Unaffected: 6.5.2.202603
Create a notification for this product.
Credits
Kimdir01
Show details on NVD website
To clipboard 

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CVE-2026-91963 (GCVE-0-2026-91963)

Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-09-15 15:58
VLAI
Title
FreeRDP 2.0.0 through 3.30.0 Uninitialized Heap Memory Disclosure via urbdrc
Summary
FreeRDP versions before 3.31.0 contain an uninitialized heap memory disclosure vulnerability in the urbdrc USB redirection channel. A malicious RDP server can induce failing USB transfers to read uninitialized heap memory from the client, defeating ASLR and enabling remote code execution when chained with memory corruption vulnerabilities.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 15:56 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
FreeRDP FreeRDP Affected: 2.0.0 , < 3.0.0 (semver)
Affected: 3.0.0 , < 3.31.0 (semver)
Unaffected: 3.31.0 (semver)
Create a notification for this product.
FreeRDP FreeRDP Affected: 0 , < 3.31.0 (semver)
Unaffected: 3.31.0 (semver)
Create a notification for this product.
Date Public
2026-09-01 00:00
Credits
iarce-qb
Show details on NVD website
To clipboard 

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CVE-2026-85068 (GCVE-0-2026-85068)

Vulnerability from cvelistv5 – Published: 2026-11-05 22:57 – Updated: 2026-11-05 22:57
VLAI
Title
NUT blazer_usb ippon_command stack info-leak via unzeroed char tmp[64] in OUT-direction usb_control_msg
Summary
Network UPS Tools is a collection of programs which provide a common interface for monitoring and administering UPS, PDU and SCD hardware. From 2.4.2 through 2.8.5, ippon_command in drivers/blazer_usb.c partially initializes char tmp[64] with a short Megatec status query and then passes a fixed eight-byte chunk to usb_control_msg. A malicious firmware-controlled USB device presenting the Mustek Powermust VID 0x06da and Mustek Powermust PID 0x0003 matches blazer_usb_id, selects ippon_subdriver, and can receive the uninitialized trailing stack bytes during normal polling. The disclosure is bounded and read-only, requires physical or supply-chain access to the USB bus, and has no established integrity or availability impact. This issue is scheduled to be fixed in version 2.8.6.
Severity
2.4 (Low)
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-457 - Use of Uninitialized Variable
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
networkupstools nut Affected: >= 2.4.2, <= 2.8.5
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-84391 (GCVE-0-2026-84391)

Vulnerability from cvelistv5 – Published: 2026-09-08 16:41 – Updated: 2026-11-06 15:42
VLAI
Summary
A use of uninitialized variable vulnerability in Fortinet FortiAnalyzer 7.6.3 through 7.6.6 may allow attacker to denial of service via SNMP GETBULK requests.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 17:29 UTC
CWE
Assigner
fortinet CNA
References
Impacted products
Vendor Product Version
Fortinet FortiAnalyzer Affected: 7.6.3 , ≤ 7.6.6 (semver)
    cpe:2.3:o:fortinet:fortianalyzer:7.6.6:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortianalyzer:7.6.5:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortianalyzer:7.6.4:*:*:*:*:*:*:*
    cpe:2.3:o:fortinet:fortianalyzer:7.6.3:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-76919 (GCVE-0-2026-76919)

Vulnerability from cvelistv5 – Published: 2026-08-19 22:45 – Updated: 2026-09-17 18:47
VLAI
Title
Use of Uninitialized Variable in Wireshark
Summary
ESS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:07 UTC
CWE
  • CWE-457 - Use of Uninitialized Variable
Assigner
GitLab CNA
References
Impacted products
Vendor Product Version
Wireshark Foundation Wireshark Affected: 4.6.0 , < 4.6.8 (semver)
Affected: 4.4.0 , < 4.4.18 (semver)
Create a notification for this product.
Credits
Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)
Show details on NVD website
To clipboard 

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CVE-2026-68907 (GCVE-0-2026-68907)

Vulnerability from cvelistv5 – Published: 2026-10-16 15:48 – Updated: 2026-10-16 17:05
VLAI
Title
libIEC61850: Server-side out-of-bounds stack read in association-specific dynamic dataset creation due to reversed StringUtils_copyStringToBuffer arguments
Summary
libIEC61850 is an open-source implementation of IEC 61850 client and server protocols including MMS, GOOSE, Sampled Values, and R-Session. Prior to 1.6.2, checkDataSetAccess reverses the source and destination arguments to StringUtils_copyStringToBuffer while constructing an MMS_ASSOCIATION_SPECIFIC dataset reference. The helper treats uninitialized dataSetRef[130] storage as a source string, causing strlen to read beyond the stack buffer, and then copies those bytes into the caller-owned listName buffer. A remote defineNamedVariableList request can crash servers that have dynamic dataset service enabled and a dataset access handler installed; the advisory also observes caller stack corruption but establishes denial of service as the primary impact. This issue is fixed in version 1.6.2.
Severity
8.2 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 16:32 UTC
CWE
  • CWE-125 - Out-of-bounds Read
  • CWE-457 - Use of Uninitialized Variable
  • CWE-628 - Function Call with Incorrectly Specified Arguments
Assigner
GitHub_M CNA
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-66859 (GCVE-0-2026-66859)

Vulnerability from cvelistv5 – Published: 2026-10-02 12:23 – Updated: 2026-10-02 16:55
VLAI
Title
Apache Thrift: c_glib multiplexed processor crashes on a message it cannot route
Summary
NULL Pointer Dereference, Use of Uninitialized Variable vulnerability in Apache Thrift c_glib bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 16:55 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
  • CWE-457 - Use of Uninitialized Variable
Assigner
apache CNA
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache Thrift Affected: 0 , < 0.25.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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Mitigation MIT-57
Implementation

Strategy: Attack Surface Reduction

Ensure that critical variables are initialized before first use [REF-1485].

Mitigation
Build and Compilation

Strategy: Compilation or Build Hardening

Most compilers will complain about the use of uninitialized variables if warnings are turned on.

Mitigation
Implementation Operation

When using a language that does not require explicit declaration of variables, run or compile the software in a mode that reports undeclared or unknown variables. This may indicate the presence of a typographic error in the variable's name.

Mitigation
Requirements

Strategy: Language Selection

Choose a language that is not susceptible to these issues.

Mitigation
Architecture and Design

Mitigating technologies such as safe string libraries and container abstractions could be introduced.

No CAPEC attack patterns related to this CWE.

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