CVE-2026-85366
High
Description
Heap-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft Windows
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-122CWE-122
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1809 | No range specified | — |
| microsoft windows_server_2019 | No range specified | — |
| microsoft windows_server_2022 | No range specified | — |
| microsoft windows_10_21H2 | No range specified | — |
| microsoft windows_10_22H2 | No range specified | — |
| microsoft windows_server_2025 | No range specified | — |
| microsoft windows_11_25H2 | No range specified | — |
| microsoft windows_11_23H2 | No range specified | — |
| microsoft windows_11_24H2 | No range specified | — |
| microsoft windows_11_26H1 | No range specified | — |
| microsoft windows_10_1607 | No range specified | — |
| microsoft windows_server_2016 | No range specified | — |
| microsoft windows_server_2012 | No range specified | — |
| microsoft windows_server_2012_R2 | No range specified | — |
| microsoft windows_11_version_26h2_for_arm64-based_systems | No range specified | — |
| microsoft windows_11_version_26h2_for_x64-based_systems | No range specified | — |
Check your version
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