CVE-2025-48172

MEDIUMNVD 5.65.6—Elevated

5.6

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.

CVSS v3: 5.6
EG Score: 5.6(medium)
EPSS: 25.1%
KEV: Not listed

Published

July 4, 2025

Last Modified

April 15, 2026

References (5)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-190Integer Overflow or Wraparound

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2025-48172?

CVE-2025-48172 is a medium vulnerability published on July 4, 2025. CHMLib through 2bef8d0, as used in SumatraPDF and other products, has a chmlib.c chmdecompressblock integer overflow. There is a resultant heap-based buffer overflow in chmfetch_bytes.

When was CVE-2025-48172 disclosed?

CVE-2025-48172 was first published in the National Vulnerability Database on July 4, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-48172 actively exploited?

CVE-2025-48172 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-48172?

CVE-2025-48172 has a CVSS v3 base score of 5.6 (NVD).

How do I remediate CVE-2025-48172?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-48172, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-48172

📅 Published

🔄 Last Modified

🔗 References (5)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-48172?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (5)

Frequently asked(5)

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