CVE-2025-21311

CRITICALNVD 9.89.8—Trending — 5 sources updated this week

9.8

Windows NTLM V1 Elevation of Privilege Vulnerability

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 87.4%
KEV: Not listed

Published

January 14, 2025

Last Modified

January 24, 2025

References (1)

secure@microsofthttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21311

Weakness Classification(1)

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

CWE-303

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2025-213112025-01-14
Windows NTLM V1 Elevation of Privilege Vulnerability

Data Freshness Timeline

(refreshed 9× in last 7d / 9× 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.

2026-05-31 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 13:23 UTCEG score recompute
2026-05-30 13:23 UTCVendor advisory
2026-05-30 13:23 UTCGHSA enrichment
2026-05-30 00:35 UTCOSV refresh
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-21311?

CVE-2025-21311 is a critical vulnerability published on January 14, 2025. Windows NTLM V1 Elevation of Privilege Vulnerability

When was CVE-2025-21311 disclosed?

CVE-2025-21311 was first published in the National Vulnerability Database on January 14, 2025, with the most recent update on January 24, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-21311 actively exploited?

CVE-2025-21311 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 87.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-21311?

CVE-2025-21311 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2025-21311?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21311, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-21311

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Is Your Infrastructure Affected by CVE-2025-21311?

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