CVE-2025-12611 HIGH

CVE-2025-12611: Tenda AC21 SetPptpServerCfg formSetPPTPServer buffer overflow

Vendor Tenda
Product AC21
Weakness CWE-120
Published November 3, 2025
Last update February 24, 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 AC21 16.03.08.16. This vulnerability affects the function formSetPPTPServer of the file /goform/SetPptpServerCfg. The manipulation of the argument startIp leads to buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

Key dates

02Disclosure timeline

November 3, 2025 CVE published
February 24, 2026 Record updated