Buffer overflow in Tenda Ac9
CVE-2025-5839
A vulnerability, which was classified as critical, has been found in Tenda AC9 15.03.02.13. Affected by this issue is the function fromadvsetlanip of the file /goform/AdvSetLanip of the component POST Request Handler. The manipulation of the argument lanMask leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
Vulnerability class: Buffer Overflow
EPSS: 0.008 (52.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Tenda Ac9 — versions 1.0, 15.03.02.13
- Tenda Ac9_firmware — versions 15.03.2.13
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- cna@vuldb.com (signature, Permissions Required, permissions-required)
- cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
- cna@vuldb.com (Product, product, broken-link)
Frequently asked questions
- What is CVE-2025-5839?
- CVE-2025-5839 is a high-severity vulnerability in Tenda Ac9, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-06-07.
- How severe is CVE-2025-5839?
- High severity. CVSS v3 base score is 8.8 out of 10.