CVE-2021-31755

State: Published
Severity: 9.8 Critical
Published: May 7, 2021
Updated: Oct 21, 2025
Reserved: Apr 23, 2021

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755government-resource

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