Vulnerability · Published Jul 11, 2025 · Assigned by VulDB

CVE-2025-7421Tenda O3V2 httpd operateMacFilter fromMacFilterModify stack-based overflow

High 8.8

In plain English

A high-severity stack buffer overflow in O3V2 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.0%top 38.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been rated as critical. This issue affects the function fromMacFilterModify of the file /goform/operateMacFilter of the component httpd. The manipulation of the argument mac leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
Tenda	O3V2	1.0.0.12(3880)

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-315881 | Tenda O3V2 httpd operateMacFilter fromMacFilterModify stack-based overflow vdb-entry, technical-description
VDB-315881 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #608867 | Tenda O3V2 1.0.0.12(3880) Stack-based Buffer Overflow third-party-advisory
https://github.com/wudipjq/my_vuln/blob/main/Tenda3/vuln_54/54.md related
https://github.com/wudipjq/my_vuln/blob/main/Tenda3/vuln_54/54.md#poc exploit
https://www.tenda.com.cn/ product