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The vulnerability of the UEFI Secure Boot protection mechanism in Windows operating systems allows a hacker to circumvent security restrictions and execute arbitrary code.

🗓️ 01 Jul 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec
🔗 bdu.fstec.ru👁 2 Views

A flaw in Windows UEFI Secure Boot that cannot be updated lets attackers bypass security and run code.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl
CVE-2026-8863
9 Jun 202615:44
circl
CNNVD
Microsoft Windows 安全漏洞
9 Jun 202600:00
cnnvd
CVE
CVE-2026-8863
9 Jun 202618:10
cve
Cvelist
CVE-2026-8863 CVE-2026-8863
9 Jun 202618:10
cvelist
EUVD
EUVD-2026-35791
9 Jun 202618:10
euvd
Microsoft KB
June 9, 2026—KB5093998 (OS Build 22631.7219)
9 Jun 202614:00
mskb
Microsoft KB
June 9, 2026—KB5094041 (Monthly Rollup)
9 Jun 202614:00
mskb
Microsoft KB
June 9, 2026—KB5094042 (Monthly Rollup)
9 Jun 202614:00
mskb
Microsoft KB
June 9, 2026—KB5094123 (OS Build 17763.8880)
9 Jun 202614:00
mskb
Microsoft KB
June 9, 2026—KB5094125 (OS Build 26100.32995)
9 Jun 202614:00
mskb
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01 Jul 2026 00:00Current
6Medium risk
Vulners AI Score6
CVSS 26.8
CVSS 37.8
EPSS0.00097
2