Vulnerability · Published Aug 10, 2025 · Assigned by VulDB
CVE-2025-8810Tenda AC20 SetFirewallCfg strcpy 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 1.2% (higher than 69% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.2%top 31.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability classified as critical was found in Tenda AC20 16.03.08.05. Affected by this vulnerability is the function strcpy of the file /goform/SetFirewallCfg. The manipulation of the argument firewallEn leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
Affected products (as reported)
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-319339 | Tenda AC20 SetFirewallCfg strcpy stack-based overflow vdb-entry, technical-description
- VDB-319339 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #627394 | Tenda AC20 V1.0re_V16.03.08.05 Buffer Overflow third-party-advisory
- https://github.com/LaiwanHundun/CVE/blob/main/cve1 exploit
- https://www.tenda.com.cn/ product