Multiple vulnerabilities in Microsoft Windows Kernel

Published: 2025-07-09

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2025-26636 CVE-2025-48808
CWE-ID	CWE-1037 CWE-200
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	Windows Server Operating systems & Components / Operating system Windows Operating systems & Components / Operating system
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Processor optimization removal or modification of security-critical code

EUVDB-ID: #VU112657

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-26636

CWE-ID: CWE-1037 - Processor optimization removal or modification of security-critical code

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to processor optimization removal or modification of security-critical code in Windows Kernel. A local user can gain access to sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2025 10.0.26100.1742 - 2025 10.0.26100.4349

Windows: 10 1607 10.0.14393.10 - 11 24H2 10.0.26100.4349

CPE2.3

External links

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26636

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Information disclosure

EUVDB-ID: #VU112658

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-48808

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor