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CVE-2021-30661: Apple Multiple Products WebKit Storage Use-After-Free Vulnerability

criticalknown exploitedCVE-2021-30661
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit Storage contain a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

CSIRTS triage

vendor: AppleRemote code execution
What
A use-after-free vulnerability in WebKit Storage can lead to code execution.
Who is affected
Users of Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari are affected.
Urgency
Remediation is critical due to active exploitation and high severity.
Action
Update to the latest versions of affected Apple products.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-30661

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2021-30661coverage & exploitation statusNVD · CVE.org

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