CVE-2025-29808
Medium CVSS 5.5Published 2025-04-08 ยท last changed 2026-06-17
The fix
Microsoft fixes this in updateKB5055526. The fixed build differs per Windows version, so the row that matters is the one matching the machine you are looking at.
| Windows version | Fixed in build | Update | Released |
|---|---|---|---|
| Windows Server 2022 | 10.0.20348.3453 | KB5055526 | 2026-09-17 |
| Windows Server 2022 (Server Core installation) | 10.0.20348.3453 | KB5055526 | 2026-09-17 |
Having the KB is not the same as knowing whether a machine has it. Windows updates supersede each other, so the update you installed often covers a fix that shipped in an earlier one. Paste your build into the patch checker and it walks that chain for you.
What it is
Use of a cryptographic primitive with a risky implementation in Windows Cryptographic Services allows an authorized attacker to disclose information locally.
Sources
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N