Vulnerability · Published Feb 8, 2026 · Assigned by VulDB
CVE-2026-2191Tenda AC9 formGetDdosDefenceList stack-based overflow
High 7.2
In plain English
A high-severity stack buffer overflow in AC9 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities).
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.8%top 43.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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. The exploit has been made available to the public and could be used for attacks.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · 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
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
- https://github.com/glkfc/IoT-Vulnerability/blob/main/Tenda/tenda3.md exploit
- https://www.tenda.com.cn/ product