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CVE-2026-2148— Tenda AC21 Web Management DownloadFlash information disclosure

CVSS 5.3 · Medium EPSS 0.02% · P6
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I. Basic Information for CVE-2026-2148

Vulnerability Information
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Vulnerability Title
Tenda AC21 Web Management DownloadFlash information disclosure
Source: NVD (National Vulnerability Database)
Vulnerability Description
A security vulnerability has been detected in Tenda AC21 16.03.08.16. Affected is an unknown function of the file /cgi-bin/DownloadFlash of the component Web Management Interface. The manipulation leads to information disclosure. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Tenda AC21 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC21是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC21 16.03.08.16版本存在访问控制错误漏洞，该漏洞源于对文件/cgi-bin/DownloadFlash的错误操作，可能导致信息泄露。
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
TendaAC21 16.03.08.16 cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-2148

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III. Intelligence Information for CVE-2026-2148

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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-2026-21917.2 HIGHTenda AC9 formGetDdosDefenceList stack-based overflow
CVE-2026-21475.3 MEDIUMTenda AC21 Web Management DownloadLog information disclosure

IV. Related Vulnerabilities

Same product: AC21
Same vendor: Tenda
Same weakness: CWE-200

V. Comments for CVE-2026-2148

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