Vulnerability · Published Sep 1, 2025 · Assigned by VulDB
CVE-2025-9791Tenda AC20 fromAdvSetMacMtuWan stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in AC20 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.9%top 40.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A weakness has been identified in Tenda AC20 16.03.08.05. This vulnerability affects unknown code of the file /goform/fromAdvSetMacMtuWan. This manipulation of the argument wanMTU causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be exploited.
Affected products (as reported)
Weakness: CWE-121, 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-322106 | Tenda AC20 fromAdvSetMacMtuWan stack-based overflow vdb-entry, technical-description
- VDB-322106 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #641088 | Tenda Tenda AC20 AC20_V16.03.08.05 Stack-based Buffer Overflow third-party-advisory
- https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md related
- https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#poc exploit
- https://www.tenda.com.cn/ product