Tenda AC11 Router Stack Buffer Overflow Vulnerability

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. May 7, 2021 · Catalog

   Detected

   An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.

2. Nov 3, 2021 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. Nov 17, 2021 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Jun 16, 2026 · Catalog

   Updated

   An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.

Affected

• cpe tenda/ac11 firmwareversion unspecified
• vendor Tenda AC11 Routerversion unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2021-31755

  Tenda AC11 devices contain a stack buffer overflow vulnerability in /goform/setmac which allows attackers to execute code via a crafted post request.

  cisa.gov
• CVE.orgVulnerability recordCVE-2021-31755

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2021-31755

  30-day exploitation probability 86.5%

  first.org
• NIST NVDVulnerability recordCVE-2021-31755

  An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.

  nvd.nist.gov

References

• Broken Link · github.com
• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov