CVE-2021-1859

CVE-2021-1859 is a high-severity vulnerability in Apple Macos with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3. Locked Notes content may have been unexpectedly unlocked.

Frequently asked questions

What is CVE-2021-1859?
A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3. Locked Notes content may have been unexpectedly unlocked.
How severe is CVE-2021-1859?
CVE-2021-1859 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-1859 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-1859?
CVE-2021-1859 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-1859?
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-2021-1859 published?
CVE-2021-1859 was published on 2021-09-08 and last updated on 2026-06-17.

References

Affected products (1)

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