CVE-2025-64486

Name: CVE-2025-64486
Creator: NVD / NIST
Published: 2025-11-08T00:15:36.17+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 0.16%

Last modified Jun 17, 2026

CVE-2025-64486 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

Description

calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. This can be leveraged to achieve arbitrary code execution. This issue is fixed in version 8.14.0.

Metrics

CVSS 4.0

9.3/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.16%

5.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-73

References

Timeline

Published: Nov 8, 2025
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2025-64486?

How severe is CVE-2025-64486?

CVE-2025-64486 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.

How do I fix CVE-2025-64486?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-64486?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST