---
id: "CVE-2026-66335"
page: "https://infrastack.ai/live/CVE-2026-66335"
kind: "vulnerability"
aliases: ["CVE-2026-66335"]
title: "AMI Aptio BIOS: heap overflow by privileged local user"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["ami-aptio", "bios", "firmware", "infrastructure", "servers", "workstations"]
not_affected_if: ["remote-only-access"]
published_at: "2026-11-10T17:17:46+00:00"
first_seen_at: "2026-11-10T17:22:44+00:00"
updated_at: "2026-11-10T17:24:07+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66335", "first_seen_at": "2026-11-10T17:22:44+00:00"}]
exploit_sources: []
---

# AMI Aptio BIOS: heap overflow by privileged local user

Link for people: https://infrastack.ai/live/CVE-2026-66335 (this .md is for agents)

AMI Aptio BIOS firmware has a heap-based buffer overflow that a privileged local user can trigger. Successful exploitation may crash firmware update processing or failed updates, and could also affect confidentiality, integrity and availability.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-10T17:22:44+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-66335

## From the sources

AMI APTIOV contains vulnerabilities in BIOS where
privileged users may cause the “Heap-based Buffer Overflow” by local access.
Successful exploitation of this vulnerability may lead to a denial of service
during firmware update processing, such as a crash or failed update if the
out-of-bounds write hits unmapped memory. It could also impact Confidentiality,
Integrity, and Availability.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_