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 Boot protections and execute arbitrary code before the operating system loads. Specific UEFI DBX update is required to block these vulnerable boot loaders.

Score

CVSS 3.1 7.8 High

Status

Deferred - cret@cert.org

Published

2026-06-09

Last modified

2026-06-10

Affected products

• Baramundi Management Suite (Baramundi Software)
• Whitecanyon Wipedrive (Blancco Uk)
• Abitti 1 (Finland Matriculation Board)
• Rosalinux (Ntc It Rosa Llc)
• Oraclelinux7.2 Shim (Oracle Corporation)
• Factory For Linux Bootable Diagnostics (Pc-doctor)
• Network Factory For Linux Bootable Diagnostics (Pc-doctor)
• Service Center (Pc-doctor)
• Service Center Drive Erase (Pc-doctor)
• Service Center Enterprise (Pc-doctor)
• Service Center Japan (Pc-doctor)
• Wtgcreator (Spyrus)
• Opensuse Shim (Suse Linux)

References

• https://kb.cert.org/vuls/id/616257
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-8863
• https://www.kb.cert.org/vuls/id/616257