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CVE-2026-2191— Tenda AC9 formGetDdosDefenceList stack-based overflow

CVSS 7.2 · High EPSS 0.14% · P34
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I. Basic Information for CVE-2026-2191

Vulnerability Information
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Vulnerability Title
Tenda AC9 formGetDdosDefenceList stack-based overflow
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
Tenda AC9 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC9是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC9 15.03.06.42_multi版本存在安全漏洞，该漏洞源于对函数formGetDdosDefenceList的参数security.ddos.map操作不当，可能导致栈缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
TendaAC9 15.03.06.42_multi cpe:2.3:o:tenda:ac9_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-2191

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III. Intelligence Information for CVE-2026-2191

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Same Patch Batch · Tenda · 2026-02-08 · 13 CVEs total

CVE-2026-21878.8 HIGHTenda RX3 formSetQosBand set_qosMib_list stack-based overflow
CVE-2026-21868.8 HIGHTenda RX3 SetIpMacBind fromSetIpMacBind stack-based overflow
CVE-2026-21858.8 HIGHTenda RX3 MAC Filtering Configuration Endpoint setBlackRule set_device_name stack-based ov
CVE-2026-21818.8 HIGHTenda RX3 openSchedWifi stack-based overflow
CVE-2026-21808.8 HIGHTenda RX3 fast_setting_wifi_set stack-based overflow
CVE-2026-21408.8 HIGHTenda TX9 setMacFilterCfg sub_4223E0 buffer overflow
CVE-2026-21398.8 HIGHTenda TX9 fast_setting_wifi_set sub_432580 buffer overflow
CVE-2026-21388.8 HIGHTenda TX9 SetStaticRouteCfg sub_42D03C buffer overflow
CVE-2026-21378.8 HIGHTenda TX3 SetIpMacBind buffer overflow
CVE-2026-21927.2 HIGHTenda AC9 formGetRebootTimer stack-based overflow
CVE-2026-21485.3 MEDIUMTenda AC21 Web Management DownloadFlash information disclosure
CVE-2026-21475.3 MEDIUMTenda AC21 Web Management DownloadLog information disclosure

IV. Related Vulnerabilities

Same product: AC9
Same vendor: Tenda
Same weakness: CWE-121

V. Comments for CVE-2026-2191

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