CVE tracker / CVE-2026-35419
CVE-2026-35419
CVE-2026-35419 is the Windows DWM Core Library Information Disclosure Vulnerability. Microsoft rates it Important, CVSS 5.5. It is not in CISA's Known Exploited Vulnerabilities catalog. Published May 12, 2026.
Risk summary
MediumInformation Disclosure
5.5
CVSS v3 base
0.4%
EPSS: chance of exploitation in 30 days
Medium
Severity
Important
Microsoft's rating
Less Likely
Microsoft: exploitation
No
In CISA KEV
Microsoft describes it: “Out-of-bounds read in Windows DWM Core Library allows an authorized attacker to disclose information locally.”
How to fix it
Microsoft lists 8 affected products and the update that fixes each:
- KB5087539 · fixed build 10.0.26100.32860
Windows Server 2025, Windows Server 2025 (Server Core installation) - KB5089548 · fixed build 10.0.28000.2113
Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems - KB5089549 · fixed build 10.0.26100.8457, 10.0.26200.8457
Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems
What Microsoft changed
- May 12, 2026: Information published.
Details
- Weakness
- CWE-125: Out-of-bounds Read
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- May 12, 2026
- Last revised
- May 12, 2026
Get told when this changes
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References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.