High severity · published May 12, 2026
CVE-2026-34332
Windows Kernel-Mode Driver Remote Code Execution Vulnerability
8.0
CVSS
0.5%
EPSS
No
On KEV
Description
Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WS
Windows Server 2025 · Microsoft
10.0.26100.0 before 10.0.26100.32860 · source: vendor, NVD
WS
Windows Server 2025 (Server Core installation) · Microsoft
10.0.26100.0 before 10.0.26100.32860 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34332
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34332
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34332
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