CVE-2025-48172
MEDIUM
5.6
CVSS Score
Published: July 4, 2025 at 12:00 AM UTC
Updated: June 17, 2026 at 09:29 AM UTC
1 product affected across 1 vendorChmlib
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Severity
MEDIUM5.6
Exploit prediction
EPSS 0.2%
SSVC
PoC
Description
CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chm_lib.c _chm_decompress_block integer overflow. There is a resultant heap-based buffer overflow in _chm_fetch_bytes.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (4)
SSVC — Action Prioritization
SSVCPoCNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
5.6MEDIUMmitre
Vector?
Quick Info
StatusDEFERRED
CWE
CWE-190
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