How severe is CVE-2015-5914?

CVE-2015-5914 has a CVSS 2.0 base score of 4.7, rated medium severity.

Is CVE-2015-5914 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5914?

CVE-2015-5914 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5914?

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

When was CVE-2015-5914 published?

CVE-2015-5914 was published on 2015-10-09 and last updated on 2026-06-17.

CVE-2015-5914

CVE-2015-5914 is a medium-severity vulnerability in Apple Mac Os X with a CVSS 2.0 base score of 4.7. 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-17.

Key facts

Severity: Medium (CVSS 2.0 base score 4.7)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-17
Affected product: Apple Mac Os X
Published: 2015-10-09
Last modified: 2026-06-17

Description

The EFI component in Apple OS X before 10.11 allows physically proximate attackers to modify firmware during the EFI update process by inserting an Apple Ethernet Thunderbolt adapter with crafted code in an Option ROM, aka a "Thunderstrike" issue. NOTE: this issue exists because of an incomplete fix for CVE-2014-4498.

Frequently asked questions

What is CVE-2015-5914?: The EFI component in Apple OS X before 10.11 allows physically proximate attackers to modify firmware during the EFI update process by inserting an Apple Ethernet Thunderbolt adapter with crafted code in an Option ROM, aka a "Thunderstrike" issue. NOTE: this issue exists because of an incomplete fix for CVE-2014-4498.
How severe is CVE-2015-5914?: CVE-2015-5914 has a CVSS 2.0 base score of 4.7, rated medium severity.
Is CVE-2015-5914 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5914?: CVE-2015-5914 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5914?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-5914 published?: CVE-2015-5914 was published on 2015-10-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

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