How severe is CVE-2019-8858?

CVE-2019-8858 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2019-8858 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-8858?

CVE-2019-8858 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-8858?

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

When was CVE-2019-8858 published?

CVE-2019-8858 was published on 2020-10-27 and last updated on 2026-06-17.

CVE-2019-8858

CVE-2019-8858 is a medium-severity vulnerability in Apple Mac Os X with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Mac Os X
Published: 2020-10-27
Last modified: 2026-06-17

Description

A logic issue was addressed with improved state management. This issue is fixed in macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006. A user who shares their screen may not be able to end screen sharing.

Frequently asked questions

What is CVE-2019-8858?: A logic issue was addressed with improved state management. This issue is fixed in macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006. A user who shares their screen may not be able to end screen sharing.
How severe is CVE-2019-8858?: CVE-2019-8858 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2019-8858 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-8858?: CVE-2019-8858 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-8858?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-8858 published?: CVE-2019-8858 was published on 2020-10-27 and last updated on 2026-06-17.

References

https://support.apple.com/en-us/HT210722

Affected products (1)

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

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