How severe is CVE-2015-3693?

CVE-2015-3693 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2015-3693 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-3693?

CVE-2015-3693 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-3693?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-3693 published?

CVE-2015-3693 was published on 2015-07-03 and last updated on 2026-06-17.

CVE-2015-3693

CVE-2015-3693 is a critical-severity vulnerability in Apple Mac Os X with a CVSS 2.0 base score of 9.3. 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-254.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-254
Affected product: Apple Mac Os X
Published: 2015-07-03
Last modified: 2026-06-17

Description

Apple Mac EFI before 2015-001, as used in OS X before 10.10.4 and other products, does not properly set refresh rates for DDR3 RAM, which might make it easier for remote attackers to conduct row-hammer attacks, and consequently gain privileges or cause a denial of service (memory corruption), by triggering certain patterns of access to memory locations.

Frequently asked questions

What is CVE-2015-3693?: Apple Mac EFI before 2015-001, as used in OS X before 10.10.4 and other products, does not properly set refresh rates for DDR3 RAM, which might make it easier for remote attackers to conduct row-hammer attacks, and consequently gain privileges or cause a denial of service (memory corruption), by triggering certain patterns of access to memory locations.
How severe is CVE-2015-3693?: CVE-2015-3693 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2015-3693 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-3693?: CVE-2015-3693 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-3693?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-3693 published?: CVE-2015-3693 was published on 2015-07-03 and last updated on 2026-06-17.

References

Affected products (1)

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

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