Vulnerability · Published Oct 7, 2025 · Assigned by VulDB
CVE-2025-11385Tenda AC20 fast_setting_wifi_set sscanf 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 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 42.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability has been found in Tenda AC20 up to 16.03.08.12. The affected element is the function sscanf of the file /goform/fast_setting_wifi_set. The manipulation of the argument timeZone leads to buffer overflow. The attack can be initiated 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-327312 | Tenda AC20 fast_setting_wifi_set sscanf buffer overflow vdb-entry, technical-description
- VDB-327312 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #664922 | Shenzhen Tenda Technology Co.,Ltd. AC20 <= V16.03.08.12 (latest) Buffer Overflow third-party-advisory
- https://github.com/cymiao1978/cve/blob/main/11.md related
- https://github.com/cymiao1978/cve/blob/main/11.md#poc exploit
- https://www.tenda.com.cn/ product