CVE-2021-31755

critical

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.

References

https://thehackernews.com/2026/07/china-nexus-jadeprox-uses-new-triback.html

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755

https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3

Details

Source: Mitre, NVD

Published: 2021-05-07

Updated: 2026-06-17

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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