Quick answers
- Is CVE-2026-66334 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-66334 being exploited in the wild.
- How severe is CVE-2026-66334?
- Informational severity, published 10 November 2026.
- Which products and versions are affected?
- AMI APTIOV.
- Is there a fix for CVE-2026-66334?
- 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-2026-66334 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-66334?
- 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 write vulnerability exists in AMI APTIOV BIOS that can be triggered during firmware update processing. The vulnerability requires local access and elevated privileges to exploit. Successful exploitation may cause denial of service through system crashes or failed updates, particularly if the out-of-bounds write targets unmapped memory.
Affected products
- AMI APTIOV