CVE-2026-25166
High CVSS 7.8Published 2026-03-10 ยท last changed 2026-06-17
The fix
Microsoft publishes remediation for this across 5 product branches. 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 ADK for Windows 10, version 2004 | not published | no fix available | 2026-09-17 |
| Windows ADK for Windows 11, version 22H2 | not published | no fix available | 2026-09-17 |
| Windows ADK for Windows 11, version 23H2 | not published | no fix available | 2026-09-17 |
| Windows ADK for Windows 11, version 24H2 | not published | no fix available | 2026-09-17 |
| Windows ADK for Windows Server 2022 | not published | no fix available | 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
Deserialization of untrusted data in Windows System Image Manager allows an authorized attacker to execute code locally.
Sources
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H