Vulnerability · Published Jul 14, 2026 · Assigned by microsoft
CVE-2026-56184Win32k Information Disclosure Vulnerability
Medium 5.5
In plain English
A medium-severity information exposure in Windows 10 Version 21H2 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.5%top 58.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Exposure of sensitive information to an unauthorized actor in Windows Win32K allows an authorized attacker to disclose information locally.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – before 10.0.19044.7548 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – before 10.0.19045.7548 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.8875 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – before 10.0.26200.8875 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – before 10.0.28000.2525 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – before 10.0.20348.5386 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.33158 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.33158 |
Weakness: CWE-200 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
References
- Win32k Information Disclosure Vulnerability vendor-advisory, patch