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CVE-2026-8863: Undefined Security Weakness

🗓️ 09 Jun 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 6 Views

Admin-level SecureBoot bypass in Microsoft-sigend UEFI SHIM bootloaders allows code execution.

Related
Refs
ReporterTitlePublishedViews
Family
bdu_fstec
BDU FSTEC
UEFI Secure Boot Windows Code Execution
1 Jul 202600:00
–bdu_fstec
circl
Circl
CVE-2026-8863
9 Jun 202615:44
–circl
cnnvd
CNNVD
Microsoft Windows 安全漏洞
9 Jun 202600:00
–cnnvd
cve
CVE
CVE-2026-8863
9 Jun 202618:10
–cve
cvelist
Cvelist
CVE-2026-8863 CVE-2026-8863
9 Jun 202618:10
–cvelist
euvd
EUVD
EUVD-2026-35791
9 Jun 202618:10
–euvd
mskb
Microsoft KB
June 9, 2026—KB5093998 (OS Build 22631.7219)
9 Jun 202614:00
–mskb
mskb
Microsoft KB
June 9, 2026—KB5094041 (Monthly Rollup)
14 Jul 202614:00
–mskb
mskb
Microsoft KB
June 9, 2026—KB5094042 (Monthly Rollup)
14 Jul 202614:00
–mskb
mskb
Microsoft KB
June 9, 2026—KB5094123 (OS Build 17763.8880)
9 Jun 202614:00
–mskb
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23 Jul 2026 00:00Current
7.8High risk
Vulners AI Score7.8
CVSS 3.17.8
EPSS0.00106
SSVC
6