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Fencer Vulns
high 7.8

CVE-2026-8863 json

CVE-2026-8863

published 2026-06-09 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-35791

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-8863 updated cvss 7.6

shim: Spyrus WTGCreator: Baramundi Management Suite: WhiteCanyon WipeDrive: Abitti: NTC IT Rosa: PC-Doctor Service Center: UEFI SHIM Bootloaders: SecureBoot bypass due to insufficient SBAT validation

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Oracle Corporation OracleLinux(7.2) shim
  • PC-Doctor Service Center Enterprise
  • PC-Doctor Service Center Drive Erase
  • PC-Doctor Service Center Japan
  • PC-Doctor Service Center
  • PC-Doctor Network Factory for Linux (Bootable Diagnostics)
  • PC-Doctor Factory for Linux (Bootable Diagnostics)
  • Spyrus WTGCreator
  • Blancco UK WhiteCanyon WipeDrive
  • baramundi software baramundi Management Suite
  • SUSE Linux OpenSUSE shim
  • Finland Matriculation Board Abitti 1
  • NTC IT ROSA LLC RosaLinux

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.