How severe is CVE-2016-1797?

CVE-2016-1797 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-1797 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1797?

CVE-2016-1797 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-1797?

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

When was CVE-2016-1797 published?

CVE-2016-1797 was published on 2016-05-20 and last updated on 2026-06-17.

CVE-2016-1797

CVE-2016-1797 is a high-severity vulnerability in Apple Mac Os X with a CVSS 3.x base score of 7.8. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Apple Mac Os X
Published: 2016-05-20
Last modified: 2026-06-17

Description

Apple Type Services (ATS) in Apple OS X before 10.11.5 allows attackers to bypass intended FontValidator sandbox-policy restrictions and execute arbitrary code in a privileged context via a crafted app.

Frequently asked questions

What is CVE-2016-1797?: Apple Type Services (ATS) in Apple OS X before 10.11.5 allows attackers to bypass intended FontValidator sandbox-policy restrictions and execute arbitrary code in a privileged context via a crafted app.
How severe is CVE-2016-1797?: CVE-2016-1797 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-1797 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1797?: CVE-2016-1797 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-1797?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-1797 published?: CVE-2016-1797 was published on 2016-05-20 and last updated on 2026-06-17.

References

Affected products (1)

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

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