CVE-2026-2140 HIGH

CVE-2026-2140: Tenda TX9 setMacFilterCfg sub_4223E0 buffer overflow

Vendor Tenda
Product TX9
Weakness CWE-120
Published February 8, 2026
Last update February 23, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

A vulnerability was identified in Tenda TX9 up to 22.03.02.10_multi. Affected by this issue is the function sub_4223E0 of the file /goform/setMacFilterCfg. Such manipulation of the argument deviceList leads to buffer overflow. The attack may be launched remotely. The exploit is publicly available and might be used.

Key dates

02Disclosure timeline

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