CVE-2021-1814

CVE-2021-1814 is a high-severity vulnerability in Apple Macos 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.

Key facts

Description

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.3, watchOS 7.4. Processing a maliciously crafted image may lead to arbitrary code execution.

Frequently asked questions

What is CVE-2021-1814?
This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.3, watchOS 7.4. Processing a maliciously crafted image may lead to arbitrary code execution.
How severe is CVE-2021-1814?
CVE-2021-1814 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-2021-1814 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-1814?
CVE-2021-1814 primarily affects Apple Macos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-1814?
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-2021-1814 published?
CVE-2021-1814 was published on 2021-09-08 and last updated on 2026-06-17.

References

Affected products (2)

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