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CVE-2025-29808: Windows Cryptographic Services Information Disclosure Vulnerability

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-08 · updated 2026-08-10
• Weakness: CWE-1240

Description

Use of a cryptographic primitive with a risky implementation in Windows Cryptographic Services allows an authorized attacker to disclose information locally.

Affected products

• Microsoft Windows Server 2022: before 10.0.20348.3453 — fixed in 10.0.20348.3453
• Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.3453 — fixed in 10.0.20348.3453

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2022 10.0.20348.3453; Microsoft Windows Server 2022 10.0.20348.3453. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29808

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