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CISA Known Exploited Vulnerability

This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.

CVE

CVE-2021-31755

9.8

CVSScritical

Exploitable remotely over the internet · no authentication required.

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.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

Updated Oct 24, 2026View on NVD →

S4E scanner

criticalProduct Based Web Vulnerabilities~10 seconds

CVE-2021-31755 Scanner

CVE-2021-31755 scanner - Remote Code Execution (RCE) vulnerability in Tenda AC11

Used 2.6k times · 3.4k assets checked · domain, ipv4, subdomain

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