SB2025061076 - Multiple vulnerabilities in Microsoft Windows Local Security Authority (LSA)

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper access control (CVE-ID: CVE-2025-33056)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in Windows Local Security Authority (LSA). A remote attacker can bypass implemented security restrictions and perform a denial of service (DoS) attack.

2) NULL pointer dereference (CVE-ID: CVE-2025-33057)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in Windows Local Security Authority (LSA). A remote user can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-33056
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-33057