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CVE-2026-59800— 9Router < 0.4.44 - OS Command Injection via sudoPassword Parameter in Tailscale Install Endpoint

CVSS 9.8 · Critical EPSS 1.37% · P69

Affected Version Matrix 2

VendorProductVersion RangeStatus
decolua9router< 0.4.44affected
0.4.44unaffected
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I. Basic Information for CVE-2026-59800

Vulnerability Information
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Vulnerability Title
9Router < 0.4.44 - OS Command Injection via sudoPassword Parameter in Tailscale Install Endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
9Router before 0.4.44 contains an OS command injection vulnerability in the unauthenticated POST /api/tunnel/tailscale-install endpoint (this route is not covered by the dashboard middleware matcher, so no authorization check is applied). The sudoPassword field from the request body is written to the stdin of a 'sudo -S sh' child process. When sudo does not prompt for a password (the process runs as root, NOPASSWD is configured, or a recent sudo timestamp cache exists), the sudoPassword value is interpreted by sh as a shell command, allowing a remote unauthenticated attacker to execute arbitrary OS commands. Exploitation evidence was first observed by the Shadowserver Foundation on 2026-07-04 (UTC).
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
Vulnerability Title
9Router 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
9Router 9Router是9Router公司的一款人工智能路由器。 9Router 0.4.44之前版本存在命令注入漏洞，该漏洞源于未授权POST /api/tunnel/tailscale-install端点中os命令注入漏洞，其中sudoPassword字段被写入sudo -S sh子进程的标准输入，导致远程未授权攻击者执行任意OS命令。
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
decolua9router 0 ~ 0.4.44 -

II. Public POCs for CVE-2026-59800

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 8764 chars
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III. Intelligence Information for CVE-2026-59800

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Vendor Advisories for CVE-2026-59800 (2)

IV. Related Vulnerabilities

Same product: 9router
Same vendor: decolua
Same weakness: CWE-78

V. Comments for CVE-2026-59800

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