Vulnerability · Published Oct 28, 2021 · Assigned by apple

CVE-2021-1821

Medium 6.5

In plain English

A medium-severity security flaw in macOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).

Severity (CVSS NVD)6.5Medium

Exploit odds (30 days)0.7%top 48.3% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Apple	macOS	unspecified – before 11.5
Apple	macOS	unspecified – before 7.6

References

https://support.apple.com/en-us/HT212602 x_refsource_MISC
https://support.apple.com/en-us/HT212605 x_refsource_MISC