CVE-2021-42309
Microsoft SharePoint Server Remote Code Execution Vulnerability
HIGH
8.8
CVSS Score
Published: December 15, 2021 at 02:14 PM UTC
Updated: June 17, 2026 at 04:09 AM UTC
6 products affected across 1 vendorSharePoint ServerSharePoint Enterprise ServerSharePoint Foundation
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Severity
HIGH8.8
Exploit prediction
EPSS 3%
Description
Microsoft SharePoint Server Remote Code Execution Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 15.0.5407.1000, so it looks safe — our inference, not a vendor statement
16.0.0 ≤ v < 16.0.5254.100016.0.0
Affected range stops below 16.0.5254.1000, so it looks safe — our inference, not a vendor statement
16.0.0 ≤ v < 16.0.10381.2000116.0.0
Affected range stops below 16.0.10381.20001, so it looks safe — our inference, not a vendor statement
16.0.0 ≤ v < 16.0.14326.2062016.0.0
Affected range stops below 16.0.14326.20620, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42309x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
https://www.zerodayinitiative.com/advisories/ZDI-22-074/CVSS
8.8HIGHmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-94CWE-732
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