← Vulnerability feed

Vulnerability record · CVE-2026-2191 · published 8 February 2026

CVE-2026-2191: Tenda ac9 firmware memory buffer overflow vulnerability

Tenda · Ac9 Firmware

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.

7.3 CVSS 4.0 High EPSS 0.69% · top 49.2% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow
7.3CVSS 4.0 base score, v2 8.3
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/glkfc/IoT-Vulnerability/blob/main/Tenda/tenda3.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.344894 Permissions RequiredVDB Entry
https://vuldb.com/?id.344894 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.749800 Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/ Product

Track CVE-2026-2191 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-14558Tenda AC7, AC9 and AC10 routers command injection via setUsbUnloadTenda AC7, AC9 and AC10 router firmware contains an OS command injection flaw in the formsetUsbUnload function, which passes untrusted input from a c…KEVEPSS 8.7%analysed9.8CVE-2025-45042Tenda ac9 firmware command injection vulnerabilityTenda AC9 v15.03.05.14 was discovered to contain a command injection vulnerability via the Telnet function.EPSS 1.6%9.8CVE-2025-44872Tenda ac9 firmware command injection vulnerabilityTenda AC9 V15.03.06.42_multi was found to contain a command injection vulnerability in the formsetUsbUnload function via the deviceName parameter. Th…EPSS 1.8%9.8CVE-2025-44877Tenda ac9 firmware command injection vulnerabilityTenda AC9 V15.03.06.42_multi was found to contain a command injection vulnerability in the formSetSambaConf function via the usbname parameter. This …EPSS 1.8%9.8CVE-2025-45429Tenda ac9 firmware stack-based buffer overflow vulnerabilityIn the Tenda ac9 v1.0 router with firmware V15.03.05.14_multi, there is a stack overflow vulnerability in /goform/WifiWpsStart, which may lead to rem…EPSS 1.1%9.8CVE-2025-45427Tenda ac9 firmware stack-based buffer overflow vulnerabilityIn Tenda AC9 v1.0 with firmware V15.03.05.14_multi, the security parameter of /goform/WifiBasicSet has a stack overflow vulnerability, which can lead…EPSS 0.92%9.8CVE-2025-45428Tenda ac9 firmware stack-based buffer overflow vulnerabilityIn Tenda ac9 v1.0 with firmware V15.03.05.14_multi, the rebootTime parameter of /goform/SetSysAutoRebbotCfg has a stack overflow vulnerability, which…EPSS 0.92%9.8CVE-2025-29384Tenda ac9 firmware out-of-bounds write vulnerabilityIn Tenda AC9 v1.0 V15.03.05.14_multi, the wanMTU parameter of /goform/AdvSetMacMtuWan has a stack overflow vulnerability, which can lead to remote ar…EPSS 1.9%

Source: NIST National Vulnerability Database (record CVE-2026-2191), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.