Input validation error in Calibre - CVE-2025-64486
Published: November 28, 2025
Vulnerability identifier: #VU118842
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-64486
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Calibre
Affected software:
Calibre
Calibre
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to the application does not validate filenames when handling binary assets in FB2 files. A remote attacker can trick the victim into converting a malicious FictionBook file and write files to arbitrary locations on the system, leading to system compromise.
How to mitigate CVE-2025-64486
Install updates from vendor's website.