CVE-2026-8863
Multiple Microsoft-sigend UEFI SHIM bootloaders are vulnerable to SecureBoot bypass. An attacker with administrative privileges or the abili
CVSS
7.8
High
EPSS
0.1%
p1
KEV
—
Exploit Today
0
0-100
Published: Jun 9, 2026 · Last modified: Jul 23, 2026
0.1%EPSS · 30 days0.1%
2026-10-042026-11-01
Multiple Microsoft-sigend UEFI SHIM bootloaders are vulnerable to SecureBoot bypass. An attacker with administrative privileges or the ability to modify the boot process could use one of the vulnerable shim bootloaders to bypass Secure Boot protections and execute arbitrary code before the operating system loads. Specific UEFI DBX update is required to block these vulnerable boot loaders.
No related CVEs by CWE or product.