Is CVE-2021-30665 actively exploited?

Yes. CVE-2021-30665 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-30665 be exploited remotely?

The attack vector of CVE-2021-30665 has not been classified yet.

What is the CVSS score of CVE-2021-30665?

CVE-2021-30665 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-30665

HIGHCISA KEVIN THE WILD

CVE-2021-30665

Published: November 3, 2021

EPSS:0.65%probability of exploitation in 30 daysPercentile:70.6th

Official Description

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.

NVD Source

CISA KEV Advisory

Apple Multiple Products WebKit Memory Corruption Vulnerability

Added to KEV: 2021-11-03Federal patch deadline: 2021-11-17

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This vulnerability in WebKit, used by Apple products and potentially others, allows attackers to execute code by tricking users into processing malicious web content. Its inclusion in CISA's KEV catalog and active exploitation in the wild indicate a critical and urgent threat.

Active exploitation of this vulnerability has been observed in the wild, confirming its use by attackers. The nature of the flaw suggests it can be triggered remotely through crafted web content.

Recommended Action

Apply the latest security updates for Apple iOS, iPadOS, macOS, watchOS, and tvOS. Ensure all systems using WebKit for HTML processing are updated to the most recent secure versions.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-30665 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-30665 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.