HIGH
CVE-2026-8863
CVE-2026-8863
Oracle·OracleLinux(7.2) shim
7.8/ 10
CVSS 3.1
High severity
0.11%
EPSS exploit odds
Chance of exploitation in the next 30 days
Higher than 1% of all CVEs
Not listed
CISA KEV catalog
No confirmed in-the-wild exploitation on CISA's list.
Timeline
- Published
- Jun 9, 2026
- Updated
- Jun 10, 2026
- First covered
- Jul 16, 2026
- Latest story
- 4 months ago
Summary
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.
Attack profile
Attack vectorLocal
ComplexityLow
PrivilegesLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected products
- Oracle OracleLinux(7.2) shim0.9
- PC-Doctor Service Center Enterprise14 to 17.0.7536.900
- PC-Doctor Service Center Drive Erase15 to 17.0.7538.592
- PC-Doctor Service Center Japan15 to 17.0.7539.904
- PC-Doctor Service Center14 to 17.0.7535.900
- PC-Doctor Network Factory for Linux (Bootable Diagnostics)6.9 to 6.20.7711.267
- PC-Doctor Factory for Linux (Bootable Diagnostics)6.9 to 6.20.7710.267
- Spyrus WTGCreator4.2