CVE-2021-30666

Known Exploited Vulnerability Entry External Catalog

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Entry Details

CVE-2021-30666

Confirmed

Yes

2021-11-03 00:00 UTC

Timestamps

2021-11-03

2021-11-03

Scope

KEV entry: 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'}

1d19fd10-b20c-4e73-84c4-d3dc8162e70b

405284c2-e461-4670-8979-7fd2c9755a60

2026-02-02 13:26 UTC

2026-02-06 07:53 UTC

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"
}
 -
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