SB2026071582 - Multiple vulnerabilities in Microsoft Windows Cryptographic Services

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper Certificate Validation (CVE-ID: CVE-2026-50302)

CWE-ID: CWE-295 - Improper Certificate Validation

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

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper validation of server certificate in Windows Cryptographic Services. A remote attacker can bypass the application's cryptographic protections.

2) Information disclosure (CVE-ID: CVE-2026-50352)

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

CVSSv4: 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

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

The vulnerability exists due to excessive data output by the application in Windows Cryptographic Services. A local user can gain unauthorized access to sensitive information on the system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50302
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50352