Vulnerability · Published Jan 6, 2026 · Assigned by VulDB
CVE-2026-0640Tenda AC23 PowerSaveSet sscanf buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in AC23 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 3.5% (higher than 89% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)3.5%top 10.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A weakness has been identified in Tenda AC23 16.03.07.52. This affects the function sscanf of the file /goform/PowerSaveSet. Executing a manipulation of the argument Time can lead to buffer overflow. The attack can be launched remotely. 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-339683 | Tenda AC23 PowerSaveSet sscanf buffer overflow vdb-entry, technical-description
- VDB-339683 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #731772 | Tenda AC23 V16.03.07.52 Buffer Overflow third-party-advisory
- https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow/Tenda%20AC23_Buffer_Overflow.md broken-link, exploit
- https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow/Tenda%20AC23_Buffer_Overflow.md#poc broken-link, exploit
- https://www.tenda.com.cn/ product