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 t…
Vulnerability class: Buffer Overflow
EPSS: 0.006 (70.5th 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/E:P/RL:X/RC:R.
Affected products
- Tenda Ac9 — versions 15.03.02.13
Weakness classification (CWE)
References
- VDB-311582 | Tenda AC9 POST Request AdvSetLanip fromadvsetlanip buffer overflow (vdb-entry, technical-description)
- VDB-311582 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #591369 | Tenda AC9 V1.0 V15.03.02.13 Buffer Overflow (third-party-advisory)
- candle-throne-f75.notion.site/Tenda-AC9-fromadvsetlanip-20adf0aa11858027b7c3c2f… (exploit)
- www.tenda.com.cn/ (broken-link, product)
Frequently asked questions
- What is CVE-2025-5839?
- CVE-2025-5839 is a high-severity vulnerability in Tenda Ac9, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). 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.