CVE-2025-21402

HIGHNVD 7.87.8—

7.8

Microsoft Office OneNote Remote Code Execution Vulnerability

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 66.8%
KEV: Not listed

Published

January 14, 2025

Last Modified

May 19, 2026

Advisory Details (1)

Auto-updated May 19, 2026

Patch available. Sources: microsoft.

microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21402

Weakness Classification(1)

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

CWE-641Improper Restriction of Names for Files and Other Resources

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-2025-214022025-01-14
Microsoft Office OneNote Remote Code Execution Vulnerability

Data Freshness Timeline

(refreshed 20× 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.

2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-23 15:20 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-21 22:42 UTCepss_batch
2026-05-21 19:11 UTCEG score recompute
2026-05-21 19:11 UTCVendor advisory
2026-05-21 19:11 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2025-21402?

CVE-2025-21402 is a high vulnerability published on January 14, 2025. Microsoft Office OneNote Remote Code Execution Vulnerability

When was CVE-2025-21402 disclosed?

CVE-2025-21402 was first published in the National Vulnerability Database on January 14, 2025, with the most recent update on May 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-21402 actively exploited?

CVE-2025-21402 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 66.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-21402?

CVE-2025-21402 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2025-21402?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21402, 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-2025-21402

Explore →

Is Your Infrastructure Affected by CVE-2025-21402?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs