Quick answers
- Is CVE-2026-66335 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-66335 being exploited in the wild.
- How severe is CVE-2026-66335?
- Informational severity, published 10 November 2026.
- Which products and versions are affected?
- AMI APTIO V.
- Is there a fix for CVE-2026-66335?
- 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-2026-66335 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-66335?
- Check whether you run AMI Aptio V. 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
A heap-based buffer overflow exists in AMI APTIO V BIOS, triggered during firmware update processing when an out-of-bounds write occurs. Exploitation requires local privileged access and may result in a denial of service (crash or failed update), or potential code execution and information disclosure. The vulnerability is a memory safety issue in the firmware update handling code.
Affected products
- AMI APTIO V
Timeline
- 2026-11-10: disclosed