Is there a public exploit for CVE-2026-40668?

No public exploit for CVE-2026-40668 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-40668?

CVE-2026-40668 scores CVSS 4.6 (v4.0), rated medium.

What does CVE-2026-40668 affect?

CVE-2026-40668 affects AMD AMD EPYC™ Embedded 7003 Series Processors, AMD EPYC™ Embedded 8004 Series Processors, AMD EPYC™ 7003 Series Processors, AMD EPYC™ 9005 Series Processors, AMD EPYC™ Embedded 9004 Series Processors (formerly codenamed "Genoa"), AMD EPYC™ 8005 Series Processors.

4.6 Medium

Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request…

CVE-2026-40668

Authentication bypass by spoofing in AMD Secure Encrypted Virtualization (SEV) firmware could allow a malicious hypervisor to request attestation reports for VMPL 0.

Assessment

CVSS: 4.6 (v4.0)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 10 November 2026
Last updated: 10 November 2026
Affected: AMD · AMD EPYC™ 7003 Series Processors · AMD EPYC™ 8004 Series Processors · AMD EPYC™ 8005 Series Processors · AMD EPYC™ 9004 Series Processors
Assigner: AMD

CVSS vectorCVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

At the source

EUVD (ENISA)

References

https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3038.html

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