Buffer overflow in Tenda Ac9
CVE-2026-2191
A weakness has been identified in Tenda AC9 15.03.06.42_multi. Affected is the function formGetDdosDefenceList. This manipulation of the argument security.ddos.map causes stack-based buffer overflow. The attack may be initiated remotely. T…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (34.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R.
Affected products
- Tenda Ac9 — versions 15.03.06.42_multi
Weakness classification (CWE)
References
- VDB-344894 | Tenda AC9 formGetDdosDefenceList stack-based overflow (vdb-entry, technical-description)
- VDB-344894 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #749800 | Tenda AC9 v1.0/V3.0 V15.03.06.42_multi Stack-based Buffer Overflow (third-party-advisory)
- github.com/glkfc/IoT-Vulnerability/blob/main/Tenda/tenda3.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-2191?
- CVE-2026-2191 is a high-severity vulnerability in Tenda Ac9, classified under Stack-based Buffer Overflow. CVSS score: 7.2/10. Published 2026-02-08.
- How severe is CVE-2026-2191?
- High severity. CVSS v3 base score is 7.2 out of 10.