CVE-2021-31755

CRITICAL KEV NUCLEI

Tenda AC11 Firmware <= 02.03.01.104_cn - Remote Code Execution via /goform/setmac

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2021-31755 is actively exploited and listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added November 3, 2021. A Nuclei detection template is also available.

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.

Nuclei Templates (1)

Tenda Router AC11 - Remote Command Injection
CRITICALby gy741

References (2)

Core 2
Core References
Broken Link, Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3

Scores

CVSS v3 9.8
EPSS 0.9396
EPSS Percentile 99.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation active
Automatable yes
Technical Impact total

Details

CISA KEV 2021-11-03
VulnCheck KEV 2021-06-24
InTheWild.io 2021-08-06
ENISA EUVD EUVD-2021-18639
CWE
CWE-787
Status published
Products (1)
tenda/ac11_firmware < 02.03.01.104_cn
Published May 07, 2021
KEV Added Nov 03, 2021
Tracked Since Feb 18, 2026