KEV Entry

CVE-2021-30666

Known Exploited Vulnerability Entry CISA

Back to Catalog View Vulnerability
Entry Details
Confirmed Exploited

CVE-2021-30666

2021-11-03 01:00 CET

Timestamps

2021-11-03

2021-11-03

Scope

Apple iOS WebKit Buffer Overflow Vulnerability | Affected: Apple / iOS | Description: Apple iOS WebKit contains a buffer-overflow 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-2021-30666

References
  • {'id': 'CVE-2021-30666', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-30666'}

2f91c1ed-812d-484a-b44a-cd576846961a

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-119"
  ],
  "date_added": "2021-11-03",
  "due_date": "2021-11-17",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Unknown",
  "product": "iOS",
  "vendorProject": "Apple",
  "vulnerabilityName": "Apple iOS WebKit Buffer Overflow Vulnerability"
}
 -
Export Options
JSON Object JSON API View Full Catalog