CVE-2025-21402
CVE-2025-21402 is a high-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-641.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 1% (47th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-2462
- Weakness: CWE-641
- Affected product: Microsoft Office
- Published:
- Last modified:
Description
Microsoft Office OneNote Remote Code Execution Vulnerability
Frequently asked questions
- What is CVE-2025-21402?
- Microsoft Office OneNote Remote Code Execution Vulnerability
- How severe is CVE-2025-21402?
- CVE-2025-21402 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-21402 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-21402?
- CVE-2025-21402 primarily affects Microsoft Office. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-21402?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-21402 have an EU (EUVD) identifier?
- Yes. CVE-2025-21402 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-2462.
- When was CVE-2025-21402 published?
- CVE-2025-21402 was published on 2025-01-14 and last updated on 2026-06-17.
References
Affected products (3)
- cpe:2.3:a:microsoft:office:2024:*:*:*:ltsc:macos:*:*
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
- cpe:2.3:a:microsoft:onenote:-:*:*:*:*:macos:*:*
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