Vulnerability · Published Nov 3, 2025 · Assigned by VulDB
CVE-2025-12611Tenda AC21 SetPptpServerCfg formSetPPTPServer buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in AC21 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 45.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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 products (as reported)
Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-330906 | Tenda AC21 SetPptpServerCfg formSetPPTPServer buffer overflow vdb-entry, technical-description
- VDB-330906 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #678491 | Tenda AC21 V16.03.08.16 Buffer Overflow third-party-advisory
- https://github.com/LX-LX88/cve/issues/10 broken-link, exploit, issue-tracking
- https://www.tenda.com.cn/ product