CVE-2014-4860: Phoenix Technologies Ltd. SCT3 vulnerability

CVE-2014-4860: Multiple integer overflows in the Pre-EFI Initialization (PEI) boot phase in the Capsule Update feature in...

Multiple integer overflows in the Pre-EFI Initialization (PEI) boot phase in the Capsule Update feature in the UEFI implementation in EDK2 allow physically proximate attackers to bypass intended access restrictions by providing crafted data that is not properly handled during the coalescing phase.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 11:27 UTC (UTC+00:00)

Security readout for executives and security teams

This is a firmware-level issue in UEFI capsule update handling. A person with physical proximity could supply malformed update data that the early boot process mishandles, potentially bypassing intended restrictions before the operating system starts. Exposure is most likely on older systems or embedded platforms using affected Phoenix SCT3 or AMI BIOS firmware. Version certainty may require OEM firmware metadata, vendor advisories, or direct vendor confirmation. Treat this as a targeted firmware exposure requiring asset confirmation, not an internet-scale emergency. Priority rises for unattended, shared, kiosk, lab, or high-value systems with weak physical control. Mitigation focus: Inventory systems using Phoenix SCT3 or AMI BIOS firmware.; Check OEM, Phoenix, and AMI guidance for affected firmware updates.; Prioritize Phoenix SCT3 builds before 2014-05-23 for review..

Prepared: Jun 6, 2026, 02:49 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 31, 2020, 15:08 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

1Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

Phoenix Technologies Ltd.SCT3before 5/23/2014Listed

American Megatrends Incorporated (AMI)BIOSunknownListed

Weakness

CWE details

No CWE listed

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