CVE-2021-27691 — CRITICAL (9.8)

Vulnerability 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.

CVSS Score

9.8

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Tendacn	G0 Firmware	15.11.0.5\(5876\)_cn
Tendacn	G0	-
Tendacn	G1 Firmware	15.11.0.16\(9024\)_cn
Tendacn	G1	-
Tendacn	G3 Firmware	15.11.0.16\(9024\)_cn
Tendacn	G3	-

Related Weaknesses (CWE)

CWE-78 CWE-119

References

FAQ

What is CVE-2021-27691?

CVE-2021-27691 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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)_...

How severe is CVE-2021-27691?

CVE-2021-27691 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-27691?

Check the references section above for vendor advisories and patch information. Affected products include: Tendacn G0 Firmware, Tendacn G0, Tendacn G1 Firmware, Tendacn G1, Tendacn G3 Firmware.