CVE-2021-26420
mediumpriority · track · 27EPSS 0.030 · 87 %ileEURUUSgrimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
2.96% (87th) EPSS
CVSS 6.5 · medium
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · nvd
EPSS · scored 2026-10-27
Microsoft SharePoint Server Remote Code Execution Vulnerability
01
cvss
Technical severity, 0–10. One row per scoring source.
8.8
010
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.5–8.8
v3.18.8highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 2.8 · impact 5.9
v3.17.1highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Lsecondary · secure@microsoft.com USexploitability 1.6 · impact 5.5
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.
06
references (9)
External citations — patches, advisories, analysis.
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26420cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26420cnnvd
- https://vigilance.fr/vulnerability/Microsoft-SharePoint-vulnerabilities-of-June-2021-35660cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021060805cnnvd
- https://www.zerodayinitiative.com/advisories/ZDI-21-755/cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26420enisa_euvd
- https://www.zerodayinitiative.com/advisories/ZDI-21-755/enisa_euvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26420PatchVendor Advisorynvd
scry
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