CVE-2021-31755

9.8 CRITICAL CISA KEV - Actively Exploited

Published: May 07, 2021 Modified: November 10, 2025

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

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

Source: cve@mitre.org

Broken Link Exploit Issue Tracking Third Party Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Broken Link Exploit Issue Tracking Third Party Advisory

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

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

3 reference(s) from NVD

Quick Stats

CVSS v3 Score

9.8 / 10.0

EPSS (Exploit Probability)

94.3%

100th percentile

Exploitation Status

Actively Exploited

Remediation due: 2021-11-17

Weaknesses (CWE)

CWE-787 CWE-787

Affected Vendors

tenda

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