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CVE-2026-49481— UpSnap vulnerable to Remote Code Execution via IP Field Template Injection in wake_cmd/shutdown_cmd

CVSS 9.6 · Critical
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I. Basic Information for CVE-2026-49481

Vulnerability Information
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Vulnerability Title
UpSnap vulnerable to Remote Code Execution via IP Field Template Injection in wake_cmd/shutdown_cmd
Source: CVE Program / CVE List V5
Vulnerability Description
UpSnap is a wake on lan web app. Versions prior to 5.4.0 have an OS command injection vulnerability in the UpSnap’s device management functionality due to the presence of unsafe shell command template interpolation using the ip and the mac fields. User-controlled values can be inserted into the wake_cmd and shutdown_cmd templates and executed via /bin/sh -c (Linux) or cmd /C (Windows) without sanitization, resulting in an authenticated Remote Code Execution (RCE). A low-privileged user with permission to create or edit devices can execute arbitrary operating system commands on the UpSnap hosted server. Version 5.4.0 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
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

Affected Products

VendorProductAffected VersionsCPESubscribe
seriousm4xUpSnap < 5.4.0 -

II. Public POCs for CVE-2026-49481

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8116 chars
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III. Intelligence Information for CVE-2026-49481

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Vendor Advisories for CVE-2026-49481 (1)

Other References for CVE-2026-49481 (1)

IV. Related Vulnerabilities

Same product: UpSnap
Same vendor: seriousm4x
Same weakness: CWE-78

V. Comments for CVE-2026-49481

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