CVE-2025-66398
Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.19.0, an unauthenticated attacker can pollu
CVSS
9.6
Critical
EPSS
19.9%
p97
KEV
—
Exploit Today
29
0-100
Published: Jan 1, 2026 · Last modified: Oct 7, 2026 · CWE-78 · CWE-913
Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.19.0, an unauthenticated attacker can pollute the internal state (`restoreFilePath`) of the server via the `/skServer/validateBackup` endpoint. This allows the attacker to hijack the administrator's "Restore" functionality to overwrite critical server configuration files (e.g., `security.json`, `package.json`), leading to account takeover and Remote Code Execution (RCE). Version 2.19.0 patches this vulnerability.