CVE-2026-2191 HIGH

CVE-2026-2191: Tenda AC9 formGetDdosDefenceList stack-based overflow

Vendor Tenda
Product AC9
Weakness CWE-121
Published February 8, 2026
Last update February 23, 2026

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A weakness has been identified in Tenda AC9 15.03.06.42_multi. Affected is the function formGetDdosDefenceList. This manipulation of the argument security.ddos.map causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Key dates

02Disclosure timeline

February 8, 2026 CVE published
February 23, 2026 Record updated