Vulnerability · Published Dec 14, 2025 · Assigned by VulDB
CVE-2025-14656Tenda AC20 openSchedWifi httpd 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 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 45.4% 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 16.03.08.12. This affects the function httpd of the file /goform/openSchedWifi. Executing a manipulation of the argument schedStartTime/schedEndTime can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.
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-336389 | Tenda AC20 openSchedWifi httpd buffer overflow vdb-entry, technical-description
- VDB-336389 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #712917 | Tenda AC20 V16.03.08.12 Buffer Overflow third-party-advisory
- https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN14/AC20_openSchedWifi.md exploit
- https://www.tenda.com.cn/ product