How severe is CVE-2026-6485?

CVE-2026-6485 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-6485 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-6485?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-6485 published?

CVE-2026-6485 was published on 2026-09-09 and last updated on 2026-09-10.

CVE-2026-6485

CVE-2026-6485 is a high-severity vulnerability with a CVSS 3.x base score of 8.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-489.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-489
Published: 2026-09-09
Last modified: 2026-09-10

Description

UEFI BIOS embedded Shell could be used to bypass Secure Boot via shell commands or startup scripts.

Frequently asked questions

What is CVE-2026-6485?: UEFI BIOS embedded Shell could be used to bypass Secure Boot via shell commands or startup scripts.
How severe is CVE-2026-6485?: CVE-2026-6485 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-6485 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-6485?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-6485 published?: CVE-2026-6485 was published on 2026-09-09 and last updated on 2026-09-10.

References

https://www.insyde.com/security-pledge/sa-2026004/

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