Vulnerability · Published Sep 23, 2025 · Assigned by VulDB
CVE-2025-10838Tenda AC21 WifiExtraSet sub_45BB10 buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in AC21 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 65% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.1%top 35.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function sub_45BB10 of the file /goform/WifiExtraSet. The manipulation of the argument wpapsk_crypto leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might 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-325200 | Tenda AC21 WifiExtraSet sub_45BB10 buffer overflow vdb-entry, technical-description
- VDB-325200 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #657126 | Tenda AC21 ≤V16.03.08.16 Buffer Overflow third-party-advisory
- https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC21/Tenda%20AC21%20Buffer%20overflow.md related
- https://github.com/lin-3-start/lin-cve/blob/main/Tenda%20AC21/Tenda%20AC21%20Buffer%20overflow.md#poc exploit
- https://www.tenda.com.cn/ product