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CVE-2026-82539 (GCVE-0-2026-82539)

Vulnerability from cvelistv5 – Published: 2026-08-30 10:15 – Updated: 2026-09-01 18:11

Title

TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption

Summary

A vulnerability was determined in TOTOLINK A720R 4.1.5cu.630_B20250509. This impacts the function setMacFilterRules of the file cstecgi.cgi of the component MAC Filtering. Executing a manipulation of the argument desc can lead to memory corruption. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.

Severity

9.4 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

9.1 (Critical)


                        
                          CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 17:08 UTC

CWE

CWE-119 - Memory Corruption

Assigner

VulDB CNA

References

6 references

URL	Tags
https://vuldb.com/vuln/397055	vdb-entrytechnical-description
https://vuldb.com/vuln/397055/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82539	third-party-advisory
https://vuldb.com/submit/888696	third-party-advisory
https://github.com/Xernary/CVE-2026-82539	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	A720R	Affected: 4.1.5cu.630_B20250509 cpe:2.3:o:totolink:a720r_firmware::::::::

Credits

Nicola Giuffrida Xernary (VulDB User) Xernary (VulDB User)

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-82539",
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          "url": "https://vuldb.com/cve/CVE-2026-82539"
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          "name": "Submit #888696 | TOTOLINK A720R V4.1.5cu.630_B20250509 Buffer Overflow",
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    "dateUpdated": "2026-09-01T18:11:17.396Z",
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  "dataType": "CVE_RECORD",
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}

CVE-2025-9303 (GCVE-0-2025-9303)

Vulnerability from cvelistv5 – Published: 2025-08-21 14:32 – Updated: 2025-08-21 14:51

Title

TOTOLINK A720R cstecgi.cgi setParentalRules buffer overflow

Summary

A security flaw has been discovered in TOTOLINK A720R 4.1.5cu.630_B20250509. This issue affects the function setParentalRules of the file /cgi-bin/cstecgi.cgi. Performing manipulation of the argument desc results in buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be exploited.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

8.8 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-21 14:51 UTC

CWE

CWE-120 - Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB CNA

References

6 references

URL	Tags
https://vuldb.com/?id.320908	vdb-entrytechnical-description
https://vuldb.com/?ctiid.320908	signaturepermissions-required
https://vuldb.com/?submit.632410	third-party-advisory
https://github.com/lin-3-start/lin-cve/blob/main/…	related
https://github.com/lin-3-start/lin-cve/blob/main/…	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	A720R	Affected: 4.1.5cu.630_B20250509

Credits

QMSSDXN (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-9303",
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        },
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          "lang": "de",
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        }
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CVE-2025-4271 (GCVE-0-2025-4271)

Vulnerability from cvelistv5 – Published: 2025-05-05 08:00 – Updated: 2025-05-05 13:09

Title

TOTOLINK A720R cstecgi.cgi information disclosure

Summary

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument topicurl with the input showSyslog leads to information disclosure. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-05 13:00 UTC

CWE

CWE-200 - Information Disclosure
CWE-284 - Improper Access Controls

Assigner

VulDB CNA

References

5 references

URL	Tags
https://vuldb.com/?id.307375	vdb-entrytechnical-description
https://vuldb.com/?ctiid.307375	signaturepermissions-required
https://vuldb.com/?submit.563444	third-party-advisory
https://github.com/at0de/my_vulns/blob/main/TOTOL…	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	A720R	Affected: 4.1.5cu.374

Credits

153528990 (VulDB User)

Show details on NVD website

JSON

To clipboard

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          "name": "VDB-307375 | CTI Indicators (IOB, IOC, TTP, IOA)",
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          "url": "https://vuldb.com/?ctiid.307375"
        },
        {
          "name": "Submit #563444 | TOTOLINK A720R V4.1.5cu.374 Exposure of Sensitive System Information to an Unauthorized Cont",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.563444"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/at0de/my_vulns/blob/main/TOTOLINK/A720R/showSyslog.md"
        },
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          "tags": [
            "product"
          ],
          "url": "https://www.totolink.net/"
        }
      ],
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          "time": "2025-05-04T00:00:00.000Z",
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          "lang": "en",
          "time": "2025-05-04T20:30:19.000Z",
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      ],
      "title": "TOTOLINK A720R cstecgi.cgi information disclosure"
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  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2025-4271",
    "datePublished": "2025-05-05T08:00:08.825Z",
    "dateReserved": "2025-05-04T18:25:06.571Z",
    "dateUpdated": "2025-05-05T13:09:25.246Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

CVE-2025-4270 (GCVE-0-2025-4270)

Vulnerability from cvelistv5 – Published: 2025-05-05 07:31 – Updated: 2025-05-05 13:20

Title

TOTOLINK A720R Config cstecgi.cgi information disclosure

Summary

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been classified as problematic. Affected is an unknown function of the file /cgi-bin/cstecgi.cgi of the component Config Handler. The manipulation of the argument topicurl with the input getInitCfg/getSysStatusCfg leads to information disclosure. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-05 13:17 UTC

CWE

CWE-200 - Information Disclosure
CWE-284 - Improper Access Controls

Assigner

VulDB CNA

References

6 references

URL	Tags
https://vuldb.com/?id.307374	vdb-entrytechnical-description
https://vuldb.com/?ctiid.307374	signaturepermissions-required
https://vuldb.com/?submit.563442	third-party-advisory
https://github.com/at0de/my_vulns/blob/main/TOTOL…	related
https://github.com/at0de/my_vulns/blob/main/TOTOL…	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	A720R	Affected: 4.1.5cu.374

Credits

153528990 (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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              "content": {
                "id": "CVE-2025-4270",
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        },
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          "lang": "de",
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          "url": "https://vuldb.com/?ctiid.307374"
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          "url": "https://vuldb.com/?submit.563442"
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          "url": "https://github.com/at0de/my_vulns/blob/main/TOTOLINK/A720R/getInitCfg.md"
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          "url": "https://www.totolink.net/"
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  },
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CVE-2025-4269 (GCVE-0-2025-4269)

Vulnerability from cvelistv5 – Published: 2025-05-05 07:00 – Updated: 2025-05-05 13:25

Title

TOTOLINK A720R Log cstecgi.cgi access control

Summary

A vulnerability was found in TOTOLINK A720R 4.1.5cu.374 and classified as critical. This issue affects some unknown processing of the file /cgi-bin/cstecgi.cgi of the component Log Handler. The manipulation of the argument topicurl with the input clearDiagnosisLog/clearSyslog/clearTracerouteLog leads to improper access controls. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

6.5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-05 13:25 UTC

CWE

CWE-284 - Improper Access Controls
CWE-266 - Incorrect Privilege Assignment

Assigner

VulDB CNA

References

6 references

URL	Tags
https://vuldb.com/?id.307373	vdb-entrytechnical-description
https://vuldb.com/?ctiid.307373	signaturepermissions-required
https://vuldb.com/?submit.563430	third-party-advisory
https://github.com/at0de/my_vulns/blob/main/TOTOL…	related
https://github.com/at0de/my_vulns/blob/main/TOTOL…	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	A720R	Affected: 4.1.5cu.374

Credits

153528990 (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-4269",
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        },
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          "lang": "de",
          "value": "Eine kritische Schwachstelle wurde in TOTOLINK A720R 4.1.5cu.374 gefunden. Betroffen davon ist ein unbekannter Prozess der Datei /cgi-bin/cstecgi.cgi der Komponente Log Handler. Dank der Manipulation des Arguments topicurl mit der Eingabe clearDiagnosisLog/clearSyslog/clearTracerouteLog mit unbekannten Daten kann eine improper access controls-Schwachstelle ausgenutzt werden. Die Umsetzung des Angriffs kann dabei \u00fcber das Netzwerk erfolgen. Der Exploit steht zur \u00f6ffentlichen Verf\u00fcgung."
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CVE-2025-4268 (GCVE-0-2025-4268)

Vulnerability from cvelistv5 – Published: 2025-05-05 06:31 – Updated: 2025-05-05 13:47

Title

TOTOLINK A720R cstecgi.cgi missing authentication

Summary

A vulnerability has been found in TOTOLINK A720R 4.1.5cu.374 and classified as critical. This vulnerability affects unknown code of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument topicurl with the input RebootSystem leads to missing authentication. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

5.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-05 13:46 UTC

CWE

CWE-306 - Missing Authentication
CWE-287 - Improper Authentication

Assigner

VulDB CNA

References

5 references

URL	Tags
https://vuldb.com/?id.307372	vdb-entrytechnical-description
https://vuldb.com/?ctiid.307372	signaturepermissions-required
https://vuldb.com/?submit.563429	third-party-advisory
https://github.com/at0de/my_vulns/blob/main/TOTOL…	exploit
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	A720R	Affected: 4.1.5cu.374

Credits

153528990 (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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              "content": {
                "id": "CVE-2025-4268",
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        },
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        }
      ],
      "metrics": [
        {
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          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "Improper Authentication",
              "lang": "en",
              "type": "CWE"
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      "references": [
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          "name": "VDB-307372 | TOTOLINK A720R cstecgi.cgi missing authentication",
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            "technical-description"
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          "url": "https://vuldb.com/?id.307372"
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        {
          "name": "VDB-307372 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
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          "url": "https://vuldb.com/?ctiid.307372"
        },
        {
          "name": "Submit #563429 | TOTOLINK A720R V4.1.5cu.374 Missing Authentication",
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          "url": "https://vuldb.com/?submit.563429"
        },
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          "url": "https://www.totolink.net/"
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          "lang": "en",
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          "value": "VulDB entry created"
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          "lang": "en",
          "time": "2025-05-04T20:29:48.000Z",
          "value": "VulDB entry last update"
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      ],
      "title": "TOTOLINK A720R cstecgi.cgi missing authentication"
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  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
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    "cveId": "CVE-2025-4268",
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    "dateUpdated": "2025-05-05T13:47:06.365Z",
    "state": "PUBLISHED"
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CVE-2024-8869 (GCVE-0-2024-8869)

Vulnerability from cvelistv5 – Published: 2024-09-15 10:31 – Updated: 2024-09-16 20:05

Title

TOTOLINK A720R exportOvpn os command injection

Summary

A vulnerability classified as critical has been found in TOTOLINK A720R 4.1.5. Affected is the function exportOvpn. The manipulation leads to os command injection. It is possible to launch the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

2.3 (Low)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-16 20:05 UTC

CWE

CWE-78 - OS Command Injection

Assigner

VulDB CNA

References

4 references

URL	Tags
https://vuldb.com/?id.277506	vdb-entrytechnical-description
https://vuldb.com/?ctiid.277506	signaturepermissions-required
https://vuldb.com/?submit.403211	third-party-advisory
https://www.totolink.net/	product

Impacted products

1 product

Vendor	Product	Version
TOTOLINK	A720R	Affected: 4.1.5

Credits

Cl0wnK1n9 (VulDB User)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-8869",
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                "role": "CISA Coordinator",
                "timestamp": "2024-09-16T20:05:00.597102Z",
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          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
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          "lang": "en",
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        },
        {
          "lang": "de",
          "value": "Es wurde eine kritische Schwachstelle in TOTOLINK A720R 4.1.5 entdeckt. Hiervon betroffen ist die Funktion exportOvpn. Durch das Beeinflussen mit unbekannten Daten kann eine os command injection-Schwachstelle ausgenutzt werden. Der Angriff kann \u00fcber das Netzwerk angegangen werden. Die Komplexit\u00e4t eines Angriffs ist eher hoch. Sie gilt als schwierig auszunutzen."
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Find a vulnerability

Search criteria

7 vulnerabilities found for A720R by TOTOLINK

CVE-2026-82539 (GCVE-0-2026-82539)

CVE-2025-9303 (GCVE-0-2025-9303)

CVE-2025-4271 (GCVE-0-2025-4271)

CVE-2025-4270 (GCVE-0-2025-4270)

CVE-2025-4269 (GCVE-0-2025-4269)

CVE-2025-4268 (GCVE-0-2025-4268)

CVE-2024-8869 (GCVE-0-2024-8869)