High severity · published Feb 8, 2026
CVE-2026-2191
Tenda AC9 formGetDdosDefenceList stack-based overflow
7.2
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
AC9 · Tenda
15.03.06.42_multi · source: vendor
AF
Ac9 Firmware · Tenda
15.03.06.42_multi · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2191
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2191
Exploit
https://github.com/glkfc/IoT-Vulnerability/blob/main/Tenda/tenda3.md
Permissions Required
https://vuldb.com/?ctiid.344894
Third Party Advisory
https://vuldb.com/?id.344894
Third Party Advisory
https://vuldb.com/?submit.749800
Product
https://www.tenda.com.cn/
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