KEV Entry

CVE-2021-30661

Known Exploited Vulnerability Entry CISA

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Entry Details
Confirmed Exploited

CVE-2021-30661

2021-11-03 01:00 CET

Timestamps

2021-11-03

2021-11-03

Scope

Apple Multiple Products WebKit Storage Use-After-Free Vulnerability | Affected: Apple / Multiple Products | Description: 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. | Required action: Apply updates per vendor instructions. | Due date: 2021-11-17 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-30661

References
  • {'id': 'CVE-2021-30661', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-30661'}

41f2c2f4-939e-4d18-bc6f-992fb3be02cb

CISA
405284c2-e461-4670-8979-7fd2c9755a60

2026-10-02 08:10 CEST

2026-10-02 08:10 CEST

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-416"
  ],
  "date_added": "2021-11-03",
  "due_date": "2021-11-17",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "Multiple Products",
  "vendorProject": "Apple",
  "vulnerabilityName": "Apple Multiple Products WebKit Storage Use-After-Free Vulnerability"
}
 -
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