Use After Free in Microsoft 365 Apps
CVE-2021-38656
Microsoft Word Remote Code Execution Vulnerability
Vulnerability class: Use-After-Free
EPSS: 0.067 (93.3th percentile) — read the EPSS interpretation.
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.
Affected products
- Microsoft 365_apps
- Microsoft 365 Apps For Enterprise — versions 16.0.1
Weakness classification (CWE)
References
- af854a3a-2127-422b-91ae-364da2661108 (Patch, x_refsource_MISC, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (x_refsource_MISC, Third Party Advisory, VDB Entry)
- secure@microsoft.com (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2021-38656?
- CVE-2021-38656 is a high-severity vulnerability in Microsoft 365 Apps, classified under Use After Free. CVSS score: 7.8/10. Published 2021-09-15.
- How severe is CVE-2021-38656?
- High severity. CVSS v3 base score is 7.8 out of 10.