Vulnerability · Published Aug 16, 2025 · Assigned by VulDB

CVE-2025-9087Tenda AC20 SetNetControlList Endpoint set_qosMib_list 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 1.3% (higher than 71% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.3%top 29.4% 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 16.03.08.12. This affects the function set_qosMib_list of the file /goform/SetNetControlList of the component SetNetControlList Endpoint. The manipulation of the argument list leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
Tenda	AC20	16.03.08.12

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-320355 | Tenda AC20 SetNetControlList Endpoint set_qosMib_list stack-based overflow vdb-entry, technical-description
VDB-320355 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #632037 | Tenda AC20 V16.03.08.12 Buffer Overflow third-party-advisory
https://github.com/ZZ2266/.github.io/tree/main/AC20/formSetQosBand related
https://github.com/ZZ2266/.github.io/tree/main/AC20/formSetQosBand#poc-python-exploit-script exploit
https://www.tenda.com.cn/ product