CVE-2025-54939

MEDIUMNVD 5.35.3—Trending — 3 sources updated this week

5.3

LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquic_engine_packet_in memory leak.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 68.5%
KEV: Not listed

Published

August 1, 2025

Last Modified

August 27, 2025

References (4)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 15× 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.

2026-06-05 06:10 UTCepss_batch
2026-06-05 06:10 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-30 01:02 UTCEG score recompute
2026-05-30 01:02 UTCGHSA enrichment
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-54939?

CVE-2025-54939 is a medium vulnerability published on August 1, 2025. LiteSpeed QUIC (LSQUIC) Library before 4.3.1 has an lsquicenginepacket_in memory leak.

When was CVE-2025-54939 disclosed?

CVE-2025-54939 was first published in the National Vulnerability Database on August 1, 2025, with the most recent update on August 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-54939 actively exploited?

CVE-2025-54939 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 68.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-54939?

CVE-2025-54939 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2025-54939?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-54939, 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-2025-54939

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-54939?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)