Vulnerability · Published Aug 14, 2025 · Assigned by VulDB
CVE-2025-8940Tenda AC20 saveParentControlInfo strcpy buffer overflow
High 8.8
In plain English
A high-severity 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 1.0% (higher than 63% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.0%top 37.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was identified in Tenda AC20 up to 16.03.08.12. Affected by this vulnerability is the function strcpy of the file /goform/saveParentControlInfo. The manipulation of the argument Time leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may 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-319903 | Tenda AC20 saveParentControlInfo strcpy buffer overflow vdb-entry, technical-description
- VDB-319903 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #631836 | Tenda AC20 ≤ V16.03.08.12 (latest version) Buffer Overflow third-party-advisory
- https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md related
- https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md#poc exploit
- https://www.tenda.com.cn/ product