What is CVE-2021-1821?

CVE-2021-1821 is a medium-severity vulnerability in Apple macOS. CVSS score: 6.5/10. Published 2021-10-28.

How severe is CVE-2021-1821?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Apple macOS

CVE-2021-1821

A logic issue was addressed with improved state management. This issue is fixed in watchOS 7.6, macOS Big Sur 11.5. Visiting a maliciously crafted webpage may lead to a system denial of service.

EPSS: 0.006 (46.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Apple Macos — versions unspecified
Apple Watchos

References

product-security@apple.com (x_refsource_MISC, Vendor Advisory)
product-security@apple.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-1821?: CVE-2021-1821 is a medium-severity vulnerability in Apple macOS. CVSS score: 6.5/10. Published 2021-10-28.
How severe is CVE-2021-1821?: Medium severity. CVSS v3 base score is 6.5 out of 10.