PT-2026-33497 · Microsoft · Windows

Published 2026-04-14 · Updated 2026-04-18 · CVE-2026-25250

Positive Technologies (AI Summary)

CVSS v2.0

6.2

Medium

Base vector

AV:L/AC:L/Au:S/C:C/I:C/A:N

Name of the Vulnerable Software and Affected Versions Microsoft-signed third-party bootloader (affected versions not specified)

Description A security-feature bypass allows attackers to affect the system. A Microsoft-signed third-party bootloader completely skips signature verification when loading drivers, which enables a Secure Boot bypass on most Windows systems.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-325

Related Identifiers

BDU:2026-05726

CVE-2026-25250

Affected Products

Windows

References · 6

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-25250 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-25250 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05726 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-25250 · Security Note
• https://twitter.com/eclypsium/status/2045168658616312155 · Twitter Post
• https://twitter.com/vuln_tracker/status/2045359115736957258 · Twitter Post