Deserialization in Microsoft Sharepoint Enterprise Server 2016
CVE-2021-34520
Microsoft SharePoint Server Remote Code Execution Vulnerability
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.044 (91.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: +0.000
Affected products
- Microsoft Sharepoint Enterprise Server 2016 — versions 16.0.0
- Microsoft Sharepoint Foundation 2013 Service Pack 1 — versions 15.0.0
- Microsoft Sharepoint Server 2019 — versions 16.0.0
- Microsoft Sharepoint Foundation — versions 2013
- Microsoft Sharepoint Server — versions 2016, 2019
Weakness classification (CWE)
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-2021-34520 (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2021-34520?
- CVE-2021-34520 is a high-severity vulnerability in Microsoft Sharepoint Enterprise Server 2016, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2021-07-14.
- How severe is CVE-2021-34520?
- High severity. CVSS v3 base score is 8.1 out of 10.