CVE-2021-30665

criticalknown exploitedcovered by 1 sourcefirst seen 2021-11-03

Actively exploited. CVE-2021-30665 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Apple iOS, iPadOS, macOS, watchOS, and tvOS WebKit contain a memory corruption 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

What: A memory corruption vulnerability in WebKit can lead to code execution when processing malicious content.
Who is affected: All deployments of affected Apple products using WebKit.
Urgency: Remediation is critical due to active exploitation and severity.
Action: Update to the latest version of affected Apple products.

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

⚡ Watch CVE-2021-30665

Get an email if CVE-2021-30665 is added to CISA KEV, gains public exploit code, or a new advisory cites it — max one per day, one-click unsubscribe.

Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 88% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalexploitedCVE-2021-30665: Apple Multiple Products WebKit Memory Corruption Vulnerabilitycisa-kev · 2021-11-03

External references

NVD record for CVE-2021-30665

CVE.org record

CISA KEV catalog

Embed the live status

— this badge updates automatically when the KEV or exploit status changes. How to embed it →

[![CVE-2021-30665 status](https://www.csirts.com/badge/CVE-2021-30665)](https://www.csirts.com/cve/CVE-2021-30665)