Vulnerability in Microsoft 365 Copilot
CVE-2025-53799
Use of uninitialized resource in Windows Imaging Component allows an unauthorized attacker to disclose information locally.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Microsoft 365 Copilot
- Microsoft Office For Android — versions 16.0.1
- Microsoft Office
- Microsoft Windows 10 1507
- Microsoft Windows 10 1607
- Microsoft Windows 10 1809
- Microsoft Windows 10 21h2
- Microsoft Windows 10 22h2
- Microsoft Windows 10 Version 1507 — versions 10.0.10240.0
- Microsoft Windows 10 Version 1607 — versions 10.0.14393.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53799 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-53799?
- CVE-2025-53799 is a medium-severity vulnerability in Microsoft 365 Copilot, classified under Use of Uninitialized Resource. CVSS score: 5.5/10. Published 2025-09-09.
- How severe is CVE-2025-53799?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2025-53799 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.