PT-2026-47979 · Microsoft · Windows Secure Boot+1

CVE-2026-45588 · Published 2026-06-09 · Updated 2026-06-11

Positive Technologies (AI Summary)

CVSS v3.1

7.9

High

Base vector

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

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

Description A protection mechanism failure in Windows Secure Boot allows an authorized attacker to locally bypass a security feature.

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

DoS

Protection Mechanism Failure

Weakness Enumeration

CWE-693

Related Identifiers

BDU:2026-08356

CVE-2026-45588

Affected Products

Windows

Windows Secure Boot

References · 8

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45588 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45588 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-45588 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-08356 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-45588 · Security Note
• https://twitter.com/alon_leviev/status/2064409481736224800 · Twitter Post
• https://twitter.com/HugoValters/status/2064422145359266251 · Twitter Post
• https://t.me/cveNotify/167065 · Telegram Post