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CVE-2026-4253— Tenda AC8 Web UploadCfg route_set_user_policy_rule os command injection

Quick assessment

Affected
Tenda AC8
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tenda AC8是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC8 16.03.50.11版本存在操作系统命令注入漏洞，该漏洞源于对文件/cgi-bin/UploadCfg中参数wans.policy.list1的错误操作，可能导致os命令注入。

CVSS 4.7 · Medium EPSS 8.24% · P95

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4253

Vulnerability Information
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Vulnerability Title
Tenda AC8 Web UploadCfg route_set_user_policy_rule os command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in Tenda AC8 16.03.50.11. This affects the function route_set_user_policy_rule of the file /cgi-bin/UploadCfg of the component Web Interface. The manipulation of the argument wans.policy.list1 results in os command injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Tenda AC8 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tenda AC8是中国腾达（Tenda）公司的一款无线路由器。 Tenda AC8 16.03.50.11版本存在操作系统命令注入漏洞，该漏洞源于对文件/cgi-bin/UploadCfg中参数wans.policy.list1的错误操作，可能导致os命令注入。
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

Vendor Product Affected Versions CPE Subscribe
Tenda AC8 16.03.50.11 cpe:2.3:o:tenda:ac8_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4253

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III. Intelligence Information for CVE-2026-4253

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Vendor Advisories for CVE-2026-4253 (2)

Proof of Concept for CVE-2026-4253 (1)

Same Patch Batch · Tenda · 2026-03-16 · 3 CVEs total

CVE-2026-4254 9.8 CRITICAL Tenda AC8 HTTP Endpoint SysToolChangePwd doSystemCmd stack-based overflow
CVE-2026-4252 9.8 CRITICAL Tenda AC8 IPv6 check_is_ipv6 ip address for authentication

IV. Related Vulnerabilities

Same product: AC8
Same vendor: Tenda
Same weakness: CWE-78

V. Comments for CVE-2026-4253

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