CVE-2025-21354: 365 Apps Untrusted Pointer Dereference (CVSS 7.8)
CVE-2025-21354 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Microsoft Excel Remote Code Execution Vulnerability. EPSS estimates a 0.94% chance of exploitation in the next 30 days.
Description
Microsoft Excel Remote Code Execution Vulnerability
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Probability 0.94%
56.5th percentile
Probability of exploitation in the next 30 days. Learn more
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | 365 Apps | All versions |
| Microsoft | Office | 2019 |
| Microsoft | Office Long Term Servicing Channel | 2021 |
| Microsoft | Office Long Term Servicing Channel | 2024 |
| Microsoft | Office Online Server | < 16.0.10416.20047 |
References
Timeline
Published Jan 14, 2025
Last Modified Jun 17, 2026
Status Analyzed
Frequently Asked Questions
What is CVE-2025-21354?
Microsoft Excel Remote Code Execution Vulnerability
How severe is CVE-2025-21354?
CVE-2025-21354 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.
How do I fix CVE-2025-21354?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.