CVE-2021-42320
lowpriority · track · 24EPSS 0.016 · 76 %ileEURUUSgrimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
1.60% (76th) EPSS
CVSS 3.5 · low
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · nvd
EPSS · scored 2026-10-27
Microsoft SharePoint Server Spoofing Vulnerability
01
cvss
Technical severity, 0–10. One row per scoring source.
8.0
010
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.5–8
v3.15.7mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 2.1 · impact 3.6
v3.18highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 2.1 · impact 5.9
02
weaknesses
The CWE weakness classes this flaw belongs to.
03
affected products (9)
Products and version ranges known to be affected.
- microsoft sharepoint enterprise server= 2016nvdUScpe:2.3:a:microsoft:sharepoint_enterprise_server:*:*:*:*:*:*:*:*
04
also known as (4)
Other names and identifiers for this entity.
05
sources
Which sources assert this record, and when.
07
references (7)
External citations — patches, advisories, analysis.
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42320cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-42320cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42320cnnvd
- https://vigilance.fr/vulnerability/Microsoft-SharePoint-vulnerabilities-de-decembre-2021-37079cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021121449cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42320enisa_euvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42320PatchVendor Advisorynvd
scry
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan