CVE-2026-31255 — CRITICAL (9.8)

Vulnerability Description

A command injection vulnerability exists in Tenda AC18 V15.03.05.05_multi. The vulnerability is located in the /goform/SetSambaCfg interface, where improper handling of the guestuser parameter allows attackers to execute arbitrary system commands.

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
Tenda	Ac18 Firmware	15.03.05.05
Tenda	Ac18	-

Related Weaknesses (CWE)

CWE-77

References

https://github.com/izxnfirh8148/CVE_REQUESTS_references/blob/main/Tenda_AC18/TenExploitThird Party Advisory
https://github.com/izxnfirh8148/CVE_REQUESTS_references/blob/main/Tenda_AC18/TenExploitThird Party Advisory

FAQ

What is CVE-2026-31255?

CVE-2026-31255 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A command injection vulnerability exists in Tenda AC18 V15.03.05.05_multi. The vulnerability is located in the /goform/SetSambaCfg interface, where improper handling of the guestuser parameter allows ...

How severe is CVE-2026-31255?

CVE-2026-31255 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-2026-31255?

Check the references section above for vendor advisories and patch information. Affected products include: Tenda Ac18 Firmware, Tenda Ac18.