CVE-2026-56174: Windows Narrator Braille Elevation of Privilege Vulnerability

Severity: high (CVSS 7.8 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: 2026-08-11 · updated 2026-10-30
Weakness: CWE-426

Description

Untrusted search path in Windows Narrator Braille allows an authorized attacker to elevate privileges locally.

Affected products

Microsoft Windows 10: before 10.0.17763.9115 — fixed in 10.0.17763.9115
Microsoft Windows 10: before 10.0.19044.7663 — fixed in 10.0.19044.7663
Microsoft Windows 10: before 10.0.19045.7663 — fixed in 10.0.19045.7663
Microsoft Windows 11: before 10.0.22631.7517 — fixed in 10.0.22631.7517
Microsoft Windows Server 2019: before 10.0.17763.9115 — fixed in 10.0.17763.9115
Microsoft Windows Server 2022: before 10.0.20348.5440 — fixed in 10.0.20348.5440
Microsoft Windows Server 2025: before 10.0.26100.33222 — fixed in 10.0.26100.33222
Microsoft Windows 10: from 10.0.17763.0 before 10.0.17763.9121 — fixed in 10.0.17763.9121
Microsoft Windows 10: from 10.0.19044.0 before 10.0.19044.7663 — fixed in 10.0.19044.7663
Microsoft Windows 10: from 10.0.19045.0 before 10.0.19045.7663 — fixed in 10.0.19045.7663
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.7517 — fixed in 10.0.22631.7517
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.9121 — fixed in 10.0.17763.9121
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.5499 — fixed in 10.0.20348.5499
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.33296 — fixed in 10.0.26100.33296

How to fix

Upgrade to a fixed version: Microsoft Windows 10 10.0.17763.9115; Microsoft Windows 10 10.0.19044.7663; Microsoft Windows 10 10.0.19045.7663; Microsoft Windows 11 10.0.22631.7517; Microsoft Windows Server 2019 10.0.17763.9115; Microsoft Windows Server 2022 10.0.20348.5440; Microsoft Windows Server 2025 10.0.26100.33222; Microsoft Windows 10 10.0.17763.9121; Microsoft Windows 10 10.0.19044.7663; Microsoft Windows 10 10.0.19045.7663; Microsoft Windows 11 10.0.22631.7517; Microsoft Windows Server 2019 10.0.17763.9121. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56174

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