Out-of-bounds read in Microsoft Windows and Windows Server - CVE-2026-45608

Vulnerability identifier: #VU134263

CSH Severity: Low

CVSS v4: 7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-45608

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in Windows DHCP Client. A local attacker can trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

Microsoft Windows
Windows Server

Install updates from vendor's website.

Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7417, 10 22H2 10.0.19045.7417, 10 1607 10.0.14393.9234, 10 1809 10.0.17763.8880, 11 23H2 10.0.22631.7219, 11 24H2 10.0.26100.8655, 11 25H2 10.0.26200.8655, 11 26H1 10.0.28000.2269
Windows Server - addressed in versions 2004 10.0.19045.7417, 2012 R2 6.3.9600.23228, 2012 6.2.9200.26132, 2016 10.0.14393.9234, 2019 10.0.17763.8880, 2022 10.0.20348.5256, 2025 10.0.26100.32995

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45608

• Multiple vulnerabilities in Microsoft Windows DHCP Client