Vulnerability in Microsoft 365 Apps
CVE-2021-34478
Microsoft Office Remote Code Execution Vulnerability
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: 0.515 (98.9th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 98.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.512 · newest: 0.515 · change: +0.003
Affected products
- Microsoft 365 Apps
- Microsoft 365 Apps For Enterprise — versions 16.0.1
- Microsoft Office 2019 — versions 19.0.0
- Microsoft Office — versions 2019
References
- af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory, VDB Entry)
- msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34478 (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2021-34478?
- CVE-2021-34478 is a high-severity vulnerability in Microsoft 365 Apps. CVSS score: 7.8/10. Published 2021-08-12.
- How severe is CVE-2021-34478?
- High severity. CVSS v3 base score is 7.8 out of 10.