AEGLIX vulnerability intelligence
CVE-2021-31755
CRITICAL · CVSS 9.8 · Analyzed
Published: 2021-05-07 · Updated: 2026-06-17 · Source: NVD
Vulnerability overview
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.
Severity and scoring
- CVSS score
- 9.8 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-787
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Tenda · AC11 Router
- Added to catalog
- 2021-11-03
- Required action
- Apply updates per vendor instructions.
- CISA remediation due date
- 2021-11-17
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:o:tenda:ac11_firmware:*:*:*:*:*:*:*:*
Through (inclusive): 02.03.01.104_cn
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3
Broken Link · Exploit · Issue Tracking · Third Party Advisory
- https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3
Broken Link · Exploit · Issue Tracking · Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755
US Government Resource