CVE-2026-66332: AMI APTIOV out-of-bounds read in BIOS

CVE-2026-66332 · Severity: info · Published 2026-11-10

AMI APTIOV is firmware used in computer BIOS systems. A privileged local user can trigger an out-of-bounds memory read that causes denial of service during firmware updates, such as crashes or failed updates. This vulnerability could also potentially affect the confidentiality of firmware data.

Technologies: AMI APTIOV. Vendors: AMI.

Quick answers

Is CVE-2026-66332 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-66332 being exploited in the wild.
How severe is CVE-2026-66332?
Informational severity, published 10 November 2026.
Which products and versions are affected?
AMI APTIOV.
Is there a fix for CVE-2026-66332?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-66332 attacked?
It is attacked with local access, in device firmware.
Am I affected by CVE-2026-66332?
Check whether you run AMI APTIOV. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An out-of-bounds read vulnerability exists in the BIOS firmware update processing code of AMI APTIOV. A privileged local attacker can trigger the vulnerability to read unmapped memory, leading to denial of service (crash or failed firmware update). The attack requires local access and elevated privileges.

Affected products

  • AMI APTIOV

Timeline

  • 2026-11-10: disclosed

References

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