Multiple Microsoft-sigend UEFI SHIM bootloaders are vulnerable to SecureBoot bypass.
Priority LOW 35Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0011 1st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Oracle | OracleLinux(7.2) shim | 0.9 | — | No fix listed | CNA |
| PC-Doctor | Service Center Enterprise | 14 – 17.0.7536.900 | — | No fix listed | CNA |
| PC-Doctor | Service Center Drive Erase | 15 – 17.0.7538.592 | — | No fix listed | CNA |
| PC-Doctor | Service Center Japan | 15 – 17.0.7539.904 | — | No fix listed | CNA |
| PC-Doctor | Service Center | 14 – 17.0.7535.900 | — | No fix listed | CNA |
| PC-Doctor | Network Factory for Linux (Bootable Diagnostics) | 6.9 – 6.20.7711.267 | — | No fix listed | CNA |
| PC-Doctor | Factory for Linux (Bootable Diagnostics) | 6.9 – 6.20.7710.267 | — | No fix listed | CNA |
| Spyrus | WTGCreator | 4.2 | — | No fix listed | CNA |
| Blancco UK | WhiteCanyon WipeDrive | 8.0.0 – 8.1.3 | — | No fix listed | CNA |
| baramundi software | baramundi Management Suite | up to 2024R1 | — | No fix listed | CNA |
| SUSE | OpenSUSE shim | 0.9 | — | No fix listed | CNA |
| Finland Matriculation Board | Abitti 1 | 1.0.0 | — | No fix listed | CNA |
| NTC IT ROSA LLC | RosaLinux | R9 | — | No fix listed | CNA |
| NTC IT ROSA LLC | RosaLinux | R10 | — | No fix listed | CNA |
- OracleLinux(7.2) shim VendorOracle Affected 0.9 Fixed in — No fix listed CNA
- Service Center Enterprise VendorPC-Doctor Affected 14 – 17.0.7536.900 Fixed in — No fix listed CNA
- Service Center Drive Erase VendorPC-Doctor Affected 15 – 17.0.7538.592 Fixed in — No fix listed CNA
- Service Center Japan VendorPC-Doctor Affected 15 – 17.0.7539.904 Fixed in — No fix listed CNA
- Service Center VendorPC-Doctor Affected 14 – 17.0.7535.900 Fixed in — No fix listed CNA
- Network Factory for Linux (Bootable Diagnostics) VendorPC-Doctor Affected 6.9 – 6.20.7711.267 Fixed in — No fix listed CNA
- Factory for Linux (Bootable Diagnostics) VendorPC-Doctor Affected 6.9 – 6.20.7710.267 Fixed in — No fix listed CNA
- WTGCreator VendorSpyrus Affected 4.2 Fixed in — No fix listed CNA
- WhiteCanyon WipeDrive VendorBlancco UK Affected 8.0.0 – 8.1.3 Fixed in — No fix listed CNA
- baramundi Management Suite Vendorbaramundi software Affected up to 2024R1 Fixed in — No fix listed CNA
- OpenSUSE shim VendorSUSE Affected 0.9 Fixed in — No fix listed CNA
- Abitti 1 VendorFinland Matriculation Board Affected 1.0.0 Fixed in — No fix listed CNA
- RosaLinux VendorNTC IT ROSA LLC Affected R9 Fixed in — No fix listed CNA
- RosaLinux VendorNTC IT ROSA LLC Affected R10 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2026-8863
- 2026-10-03 Alias added: GHSA-4hqv-6cp5-4rq9
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
More Oracle vulnerabilities
- TI-2026-34425 Improper privilege management in Oracle Payments KEVCVSS 3.1CRITICAL 9.8
- TI-2026-27421 Missing authentication in Oracle PeopleSoft Enterprise PeopleTools KEVCVSS 3.1CRITICAL 9.8
- TI-2026-17661 Improper access control in Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in KEVCVSS 3.1CRITICAL 10.0
- TI-2025-38252 Improper authentication in Oracle Concurrent Processing KEVCVSS 3.1CRITICAL 9.8
- TI-2025-38151 Missing authentication in Oracle Identity Manager KEVCVSS 3.1CRITICAL 9.8
- TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-8863 · CVE Program
- CVE-2026-8863 · NVD
- FIRST EPSS
- GHSA-4hqv-6cp5-4rq9 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-8863 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences