CVE-2026-45588
HighCVSS 7.9Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
A protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
Risk Assessment
An attacker with physical or local access could bypass Secure Boot protections, enabling unauthorized software to run during system startup.
Recommendation
Install the latest Windows security updates available via Windows Update.
Other vulnerabilities in Windows Secure Boot
See all- CVE-2026-49783High
Improperly implemented security check for Secure Boot in Windows allows an authorized attacker to bypass a security feature locally.
- CVE-2026-48578High
Windows Secure Boot has an improper access control vulnerability that allows an authorized attacker to elevate privileges locally.
- CVE-2026-48576High
A vulnerability in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- CVE-2026-48575High
A protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- CVE-2026-48573High
A vulnerability in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- CVE-2026-48570High
A protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- CVE-2026-48568High
A protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- CVE-2026-45654High
Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
- CVE-2026-21265Medium
The vulnerability involves expiring Microsoft certificates in Secure Boot. Failure to update them may cause loss of Secure Boot functionality and protection against malware. The update process can be disrupted by firmware defects.
Original NVD description (English source)
Protection mechanism failure in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.