Vulnerability · Published Dec 30, 2025 · Assigned by VulDB
CVE-2025-15356Tenda AC20 PowerSaveSet 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 4.0% (higher than 91% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)4.0%top 9.4% 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 impacted element is the function sscanf of the file /goform/PowerSaveSet. The manipulation of the argument powerSavingEn/time/powerSaveDelay/ledCloseType 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-338742 | Tenda AC20 PowerSaveSet sscanf buffer overflow vdb-entry, technical-description
- VDB-338742 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #726360 | Tenda Tenda AC20 V16.03.08.12 Buffer Overflow third-party-advisory
- https://github.com/xyh4ck/iot_poc/tree/main/Tenda%20AC20_Buffer_Overflow broken-link, exploit
- https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC20_Buffer_Overflow/Tenda%20AC20_Buffer_Overflow.md#poc broken-link, exploit
- https://www.tenda.com.cn/ product