CVE-2025-12611

Tenda AC21 SetPptpServerCfg formSetPPTPServer buffer overflow

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.

Affected

Tenda · AC21

CVSS v4.0 VULDB

7.4 HIGHCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 NVD

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

CVSS v3.1 VULDB

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

CVSS v2.0 VULDB

9.0 HIGHAV:N/AC:L/Au:S/C:C/I:C/A:C

EPSS

0.74% chance of exploitation in the next 30 days, 54th percentile

Published

2025-11-03

Updated

2026-02-24

Proof-of-concept exploits (1)

• LX-LX88/cve/issues/100★ · 2025-10-15

Security advisories

• https://vuldb.com/?id.330906
• https://vuldb.com/?submit.678491
• https://www.tenda.com.cn

References

• CVE Record
• NVD entry

Related

• CVE-2025-12595
• CVE-2025-12596
• CVE-2025-13304
• CVE-2025-13305
• CVE-2025-13306
• CVE-2026-1324