CVE-2026-25635
8.6
HIGH
CVSS 3.1
EPSS 0.14%
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.
How to fix CVE-2026-25635
To remediate CVE-2026-25635, upgrade the affected package to a fixed version below.
- —upgrade to 5.12.0+dfsg-1+deb11u4 or later
Is CVE-2026-25635 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 5.12.0+dfsg-1+deb11u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.6 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |