High7.8Microsoft

Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

CVE-2026-40404 Published Jun 9, 2026

CVE-2026-40404

Affected products & platforms

Microsoft ServerUnclassified

Open vendor advisory

Summary

Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

Fixed versions

KB5094128 (build 10.0.20348.5256)
KB5094127 (build 10.0.19045.7417)
KB5094123 (build 10.0.17763.8880)
KB5094125 (build 10.0.26100.32995)
KB5094126 (build 10.0.26100.8655)
KB5093998 (build 10.0.22631.7219)
KB5095051 (build 10.0.28000.2269)
KB5094122 (build 10.0.14393.9234)

Official advisory · high-confidence parse· fetched 6 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Install the applicable security update for your platform: KB5094128, KB5094127, KB5094123, KB5094125, KB5094126, KB5093998 (see the Microsoft Update Catalog).

Official advisory · high-confidence parse· fetched 6 hours ago·verify at source

Source evidence

What VulniPulse actually used to build this record — and why.

Microsoft Security Update Guide (MSRC)official
Official vendor feed — the source of truth for this advisory. VulniPulse polled this feed and parsed this entry from it.
Microsoft Server
Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
Microsoft Server

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-40404NVD CVE.org MITRE

Official resources

Microsoft Update Catalog: KB5094128
Official documentation
Direct download of the KB5094128 security update named in the MSRC remediation data for this CVE.
Microsoft Update Catalog: KB5094127
Official documentation
Direct download of the KB5094127 security update named in the MSRC remediation data for this CVE.
Microsoft Update Catalog: KB5094123
Official documentation
Direct download of the KB5094123 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)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

CVE-2026-40404 Published Jun 9, 2026

CVE-2026-40404

Affected products & platforms

Microsoft ServerUnclassified

Summary

Windows Universal Disk Format File System Driver (UDFS) Elevation of Privilege Vulnerability

Fixed versions

KB5094128 (build 10.0.20348.5256)
KB5094127 (build 10.0.19045.7417)
KB5094123 (build 10.0.17763.8880)
KB5094125 (build 10.0.26100.32995)
KB5094126 (build 10.0.26100.8655)
KB5093998 (build 10.0.22631.7219)
KB5095051 (build 10.0.28000.2269)
KB5094122 (build 10.0.14393.9234)

Official advisory · high-confidence parse· fetched 6 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Install the applicable security update for your platform: KB5094128, KB5094127, KB5094123, KB5094125, KB5094126, KB5093998 (see the Microsoft Update Catalog).

Official advisory · high-confidence parse· fetched 6 hours ago·verify at source

Source evidence

What VulniPulse actually used to build this record — and why.

Microsoft Security Update Guide (MSRC)official
Official vendor feed — the source of truth for this advisory. VulniPulse polled this feed and parsed this entry from it.
Microsoft Server
Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
Microsoft Server

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-40404NVD CVE.org MITRE

Official resources

Microsoft Update Catalog: KB5094128
Official documentation
Direct download of the KB5094128 security update named in the MSRC remediation data for this CVE.
Microsoft Update Catalog: KB5094127
Official documentation
Direct download of the KB5094127 security update named in the MSRC remediation data for this CVE.
Microsoft Update Catalog: KB5094123
Official documentation
Direct download of the KB5094123 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)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.