How severe is CVE-2019-8526?

CVE-2019-8526 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-8526 being actively exploited?

Yes. CVE-2019-8526 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-04-17, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2019-8526?

CVE-2019-8526 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-8526?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2019-8526 have an EU (EUVD) identifier?

Yes. CVE-2019-8526 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-17916. It is also flagged as exploited in the EUVD (since 2023-04-17).

When was CVE-2019-8526 published?

CVE-2019-8526 was published on 2019-12-18 and last updated on 2026-06-17.

CVE-2019-8526

CVE-2019-8526 is a high-severity vulnerability in Apple Mac Os X with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-04-17). The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-04-17)
EU (EUVD) id: EUVD-2019-17916
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-04-17)
Weakness: CWE-416
Affected product: Apple Mac Os X
Published: 2019-12-18
Last modified: 2026-06-17

Description

A use after free issue was addressed with improved memory management. This issue is fixed in macOS Mojave 10.14.4. An application may be able to gain elevated privileges.

Frequently asked questions

What is CVE-2019-8526?: A use after free issue was addressed with improved memory management. This issue is fixed in macOS Mojave 10.14.4. An application may be able to gain elevated privileges.
How severe is CVE-2019-8526?: CVE-2019-8526 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-8526 being actively exploited?: Yes. CVE-2019-8526 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-04-17, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2019-8526?: CVE-2019-8526 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-8526?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2019-8526 have an EU (EUVD) identifier?: Yes. CVE-2019-8526 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-17916. It is also flagged as exploited in the EUVD (since 2023-04-17).
When was CVE-2019-8526 published?: CVE-2019-8526 was published on 2019-12-18 and last updated on 2026-06-17.

References

Affected products (1)

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

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