CVE-2021-27691

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CVSS 3.1

9.8 critical

EPSS

25%p98

Published

Apr 16, 2021 (Apr 16, 2021)

Modified

Jun 17, 2026

Description

Command Injection in Tenda G0 routers with firmware versions v15.11.0.6(9039)_CN and v15.11.0.5(5876)_CN , and Tenda G1 and G3 routers with firmware versions v15.11.0.17(9502)_CN or v15.11.0.16(9024)_CN allows remote attackers to execute arbitrary OS commands via a crafted action/setDebugCfg request. This occurs because the "formSetDebugCfg" function executes glibc's system function with untrusted input.

Vendors: tendacn
Products: g0 firmware, g1 firmware, g3 firmware
Weakness: CWE-78, CWE-119
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (25.2%)

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