Vulnerability · Published Dec 14, 2025 · Assigned by VulDB

CVE-2025-14655Tenda AC20 httpd SetSysAutoRebbotCfg formSetRebootTimer 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 3.3% (higher than 89% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)3.3%top 11.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security flaw has been discovered in Tenda AC20 16.03.08.12. The impacted element is the function formSetRebootTimer of the file /goform/SetSysAutoRebbotCfg of the component httpd. Performing a manipulation of the argument rebootTime results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

Affected products (as reported)

Vendor	Product	Versions
Tenda	AC20	16.03.08.12

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-336388 | Tenda AC20 httpd SetSysAutoRebbotCfg formSetRebootTimer stack-based overflow vdb-entry, technical-description
VDB-336388 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #712910 | Tenda AC20 V16.03.08.12 Buffer Overflow third-party-advisory
https://github.com/Madgeaaaaa/MY_VULN_2/blob/main/Tenda/VULN13/AC20_SetSysAutoRebbotCfg.md exploit
https://www.tenda.com.cn/ product