PT-2026-58157 · Microsoft · Windows

Published 2026-07-14 · Updated 2026-07-15 · CVE-2026-49783

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Windows (affected versions not specified)

Description An improperly implemented security check for standard in Windows Secure Boot allows an authorized attacker to bypass a security feature locally. This issue is particularly critical for servers, privileged workstations, and PCs utilizing BitLocker.

Recommendations Apply the July updates to resolve this issue.

Fix

Improperly Implemented Security Check for Standard

Weakness Enumeration

CWE-358

Related Identifiers

CVE-2026-49783

Affected Products

Windows

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-49783 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49783 · Vendor Advisory
• https://twitter.com/windowsforum/status/2077227184096174296 · Twitter Post