UpSnap vulnerable to Remote Code Execution via IP Field Template Injection in wake_cmd/shutdown_cmd
CVSS v3
9.6
CRITICAL
EPSS Score
—
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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 perm
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 perm
Active exploitation of CVE-2026-49481 has not been confirmed. The EPSS score is N/A%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2026-49481 has a CVSS v3 base score of 9.6 (CRITICAL severity), with vector string 3.1.
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Ranked by exploit probability (EPSS).