Medium5.9Vendor: HighMicrosoft Server

Medium [CVE-2026-6727] MITRE: CVE-2026-6727 TPM 2.0 RSA OAEP Timing Side-Channel Vulnerability

This medium-severity Microsoft Server advisory covers CVE-2026-6727 affecting Windows Server 2019, Windows Server 2022, Windows Server 2025.

CVE-2026-6727 Published Aug 11, 2026

CVE-2026-6727

Affected products & platforms

Microsoft ServerWindows Server

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Summary

MITRE: CVE-2026-6727 TPM 2.0 RSA OAEP Timing Side-Channel Vulnerability

Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 55 minutes ago·verify at source

Fixed versions

KB5120238 (build 10.0.17763.9115)
KB5120242 (build 10.0.20348.5499)
KB5120229 (build 10.0.20348.5440)
KB5120249 (build 10.0.19045.7663)
KB5120233 (build 10.0.26100.33296)
KB5120228 (build 10.0.26100.33222)
KB5121003 (build 10.0.26100.9168)
KB5120994 (build 10.0.26000.9106)

Official advisory · high-confidence parse· fetched 55 minutes ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Install the applicable security update for your platform: KB5120238, KB5120242, KB5120229, KB5120249, KB5120233, KB5120228 (see the Microsoft Update Catalog).

Official advisory · high-confidence parse· fetched 55 minutes ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Microsoft Security Update Guide (MSRC)official
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://api.msrc.microsoft.com/cvrf/v3.0/updates; this link opens the Microsoft Server advisory index instead of the raw feed document.
Microsoft Server
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Microsoft Server

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-6727NVD CVE.org MITRE

Official resources

Microsoft Update Catalog: KB5120238
Official documentation
Direct download of the KB5120238 security update named in the MSRC remediation data for this CVE.
Microsoft Update Catalog: KB5120242
Official documentation
Direct download of the KB5120242 security update named in the MSRC remediation data for this CVE.
Microsoft Update Catalog: KB5120229
Official documentation
Direct download of the KB5120229 security update named in the MSRC remediation data for this CVE.
MSRC Security Update Guide
Official documentation
Filter by this CVE for per-product KB numbers, severity and exploitability assessment.

Discussion(0)

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