AMI AptioV: Classic buffer overflow in UEFI/BIOS firmware
Summary
AMI AptioV UEFI/BIOS firmware contains a classic buffer overflow (CWE-120) and out-of-bounds write issues. An attacker with local access and low privileges, without user interaction, can trigger memory corruption and possibly arbitrary code execution with high impact on availability and some impact on confidentiality and integrity. CISA SSVC lists exploitation as none and the issue as not automatable, and no public exploit has been found.
Affected
- AMI AptioV from AptioV_5.0 to before AptioV_5.044 (per the CNA record; default configuration is unaffected)
- One secondary source lists a different upper bound (5.43), which is probably a typo and is unverified
- OEM/board-vendor firmware versions based on affected AptioV releases: unknown
Fixed in
Unknown. The fixed version is not confirmed in the sources reviewed. The AMI advisory AMI-SA-2026002 should be checked for it.
Workaround
Unknown. No vendor-stated mitigation for this CVE was found. General hardening: restrict local access, protect BIOS setup with an administrator password, and limit who can run code locally.
Exploitation
- Known exploitation: none found; not listed in CISA KEV
- CISA SSVC: exploitation none, automatable no, technical impact total
- Public proof of concept: none found (search was limited)
- EPSS: no value found
Our recommendation
- Open AMI advisory AMI-SA-2026002 and confirm the fixed AptioV version
- Inventory devices and their AptioV/BIOS versions, prioritising admin workstations and servers
- Install OEM BIOS updates as soon as they address this issue; check each vendor's release notes
- Until then, restrict local and physical access and protect BIOS setup with a password
- Re-check NVD once its analysis is published
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CVE record mirror (vulners NVD) vulners.com
- AMI Security Advisory AMI-SA-2026002 (not retrieved) go.ami.com
- Strix CVE details www.strix.ai
- CVE record mirror (threatint) cve.threatint.com
- VulDB entry 417702 vuldb.com
- AMI security advisories www.ami.com
- CERT/CC VU#209095 (general AMI Aptio guidance) www.kb.cert.org
- Security Online report on AMI Aptio firmware flaw securityonline.info
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 16:32.
Original description (NVD)
AMI APTIOV contains vulnerabilities in BIOS where users may cause “Classic Buffer Overflow” by local access. Successful exploitation of this vulnerability could lead to buffer overflows, memory corruption, and arbitrary code execution, and also impact Confidentiality, Integrity, and Availability.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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