How severe is CVE-2014-4860?

CVE-2014-4860 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2014-4860 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-4860?

CVE-2014-4860 affects Tianocore Edk2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2014-4860?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2014-4860 published?

CVE-2014-4860 was published on 2020-01-31 and last updated on 2026-06-17.

CVE-2014-4860

CVE-2014-4860 is a medium-severity vulnerability in Tianocore Edk2 with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Tianocore Edk2
Published: 2020-01-31
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2014-4860?: 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.
How severe is CVE-2014-4860?: CVE-2014-4860 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2014-4860 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-4860?: CVE-2014-4860 affects Tianocore Edk2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2014-4860?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2014-4860 published?: CVE-2014-4860 was published on 2020-01-31 and last updated on 2026-06-17.

References

http://www.kb.cert.org/vuls/id/552286

Affected products (1)

cpe:2.3:a:tianocore:edk2:-:*:*:*:*:*:*:*

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