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CVE

CVE-2026-49481

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

CVE-2026-49481

UpSnap vulnerable to Remote Code Execution via IP Field Template Injection in wake_cmd/shutdown_cmd

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 wakecmd and shutdowncmd 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.

Package Versions Affected

Package Version
patch Availability
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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/seriousm4x/UpSnap/releases/tag/5.4.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49481.json, https://github.com/seriousm4x/UpSnap/security/advisories/GHSA-6mc7-6948-w5h4, https://nvd.nist.gov/vuln/detail/CVE-2026-49481

Severity

9.6

CVSS Score
0
10

Basic Information

Base CVSS
9.6
EPSS Probability
0.00882%
EPSS Percentile
0.56533%
Introduced Version
0
Fix Available
92f9e295d5f761d874a6701245b2e38dc42cb85a

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