CVE-2026-66333 (GCVE-0-2026-66333)

Vulnerability from cvelistv5 – Published: 2026-11-10 16:22 – Updated: 2026-11-10 16:22
VLAI
Title
OFBD SMM Read Validation Issues
Summary
AMI APTIOV contains vulnerabilities in BIOS where privileged users may cause the “Out-of-Bounds Read” 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 read hits unmapped memory. It could also impact Confidentiality, and Availability.
Severity
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
Assigner
AMI CNA
References
Impacted products
Vendor Product Version
AMI AptioV Affected: AptioV_5.0 , < AptioV_5.046 (custom)
Create a notification for this product.
Credits
Zhenyu Liu Huafeng Wang
Show details on NVD website
To clipboard 

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          "lang": "en",
          "type": "finder",
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        }
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      "metrics": [
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
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            "baseScore": 4.8,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
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          "descriptions": [
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              "description": "CWE-125 Out-of-bounds read",
              "lang": "en",
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      "providerMetadata": {
        "dateUpdated": "2026-11-10T16:22:00.305Z",
        "orgId": "7e9044f1-7f56-4c38-8864-c0c7302263d6",
        "shortName": "AMI"
      },
      "references": [
        {
          "url": "https://go.ami.com/hubfs/Security%20Advisories/2026/AMI-SA-2026003.pdf"
        }
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      "source": {
        "discovery": "UNKNOWN"
      },
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  "cveMetadata": {
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    "datePublished": "2026-11-10T16:22:00.305Z",
    "dateReserved": "2026-07-24T21:31:28.218Z",
    "dateUpdated": "2026-11-10T16:22:00.305Z",
    "state": "PUBLISHED"
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