CVE-2021-40486
Microsoft Word Remote Code Execution Vulnerability
HIGH
7.8
CVSS Score
Published: October 13, 2021 at 12:27 AM UTC
Updated: June 17, 2026 at 04:07 AM UTC
9 products affected across 1 vendorOfficeSharePoint ServerWord
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Severity
HIGH7.8
Exploit prediction
EPSS 6%
Description
Microsoft Word Remote Code Execution Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
16.0.1 ≤ v < 16.0.10379.2000016.0.1
Affected range stops below 16.0.10379.20000, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.0.5389.1000, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.0.5389.1000, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.0.5389.1000, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.0.5227.1000, so it looks safe — our inference, not a vendor statement
19.0.0 ≤ v < https://aka.ms/OfficeSecurityReleases19.0.0
Affected range stops below https://aka.ms/OfficeSecurityReleases, so it looks safe — our inference, not a vendor statement
16.0.0 ≤ v < 16.0.5227.100016.0.0
Affected range stops below 16.0.5227.1000, so it looks safe — our inference, not a vendor statement
16.0.0 ≤ v < 16.0.10379.2000016.0.0
Affected range stops below 16.0.10379.20000, 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-2021-40486x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.zerodayinitiative.com/advisories/ZDI-21-1158/CVSS
7.8HIGHmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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