Vulnerability in Microsoft 365 Apps For Enterprise
CVE-2025-21357
Microsoft Outlook Remote Code Execution Vulnerability
EPSS: 0.004 (58.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.
Affected products
- Microsoft 365 Apps For Enterprise — versions 16.0.1
- Microsoft Office 2019 — versions 19.0.0
- Microsoft Office Ltsc 2021 — versions 16.0.1
- Microsoft Office Ltsc 2024 — versions 16.0.0
- Microsoft Outlook 2016 — versions 16.0.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- Microsoft Outlook Remote Code Execution Vulnerability (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2025-21357?
- CVE-2025-21357 is a medium-severity vulnerability in Microsoft 365 Apps For Enterprise, classified under Use of Uninitialized Resource. CVSS score: 6.7/10. Published 2025-01-14.
- How severe is CVE-2025-21357?
- Medium severity. CVSS v3 base score is 6.7 out of 10.
- Is CVE-2025-21357 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.