Out-of-bounds Read Affecting sumatrapdf package, versions [,3.6)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-SUMATRAPDF-15253612
- published10 Feb 2026
- disclosed9 Feb 2026
- creditHaein Lee
Introduced: 9 Feb 2026
CVE-2026-25920 (opens in a new tab)How to fix?
Upgrade sumatrapdf to version 3.6 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read in the AddCdicData() function in MOBI HuffDic decompressor. An attacker can cause a crash by opening a specially crafted .mobi file that triggers a read beyond the bounds of the CDIC dictionary buffer.