CVE-2026-8863
CVE-2026-8863
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 Boo…
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
References
Frequently asked questions
- What is CVE-2026-8863?
- CVE-2026-8863 is a high-severity vulnerability. CVSS score: 7.8/10. Published 2026-06-09.
- How severe is CVE-2026-8863?
- High severity. CVSS v3 base score is 7.8 out of 10.