CVE-2026-25635

HighCVSS 8.6/10Last modified Jun 17, 2026

Description

calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows (haven't tested on other OS's), this can lead to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. This vulnerability is fixed in 9.2.0.

Metrics

CVSS 3.1 8.6/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Feb 6, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2026-25635: High severity, CVSS 8.6 | Vulnix