Buffer overflow in Microsoft 365 Copilot
CVE-2025-53732
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.000
Affected products
- Microsoft 365 Copilot
- Microsoft Office For Android — versions 16.0.1
- Microsoft Office For Universal — versions 16.0.1
- Microsoft Office
Weakness classification (CWE)
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53732 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-53732?
- CVE-2025-53732 is a high-severity vulnerability in Microsoft 365 Copilot, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2025-08-12.
- How severe is CVE-2025-53732?
- High severity. CVSS v3 base score is 7.8 out of 10.