AMI AptioV up to _5.45 out-of-bounds write

Summaryinfo

A vulnerability was found in AMI AptioV up to _5.45. It has been rated as problematic. This affects an unknown function. Performing a manipulation results in out-of-bounds write. This vulnerability is identified as CVE-2026-66334. The attack is only possible with local access. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in AMI AptioV up to _5.45. This affects an unknown function. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on integrity, and availability. The summary by CVE is:

AMI APTIOV contains vulnerabilities in BIOS where privileged users may cause the “Out-of-Bounds Write” 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 Integrity, and Availability.

The advisory is shared at go.ami.com. This vulnerability is uniquely identified as CVE-2026-66334 since 07/24/2026. The exploitability is told to be easy. An attack has to be approached locally. The exploitation needs additional levels of successful authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version _5.046 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• AMI

Name

• AptioV

Version

• _5.0
• _5.1
• _5.2
• _5.3
• _5.4
• _5.5
• _5.6
• _5.7
• _5.8
• _5.9
• _5.10
• _5.11
• _5.12
• _5.13
• _5.14
• _5.15
• _5.16
• _5.17
• _5.18
• _5.19
• _5.20
• _5.21
• _5.22
• _5.23
• _5.24
• _5.25
• _5.26
• _5.27
• _5.28
• _5.29
• _5.30
• _5.31
• _5.32
• _5.33
• _5.34
• _5.35
• _5.36
• _5.37
• _5.38
• _5.39
• _5.40
• _5.41
• _5.42
• _5.43
• _5.44
• _5.45

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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