Exploitation evidence
Known exploited · CISA KEV listed
Added 2022-05-04. Ransomware campaign use: Unknown.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2022-05-25. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Apple / iOS and iPadOS
Default status: Not specified
- affected: unspecified to < 14.4 (custom)
Apple / macOS
Default status: Not specified
- affected: unspecified to < 11.2 (custom)
Apple / macOS
Default status: Not specified
- affected: unspecified to < 7.3 (custom)
Apple / macOS
Default status: Not specified
- affected: unspecified to < 14.4 (custom)
Apple / macOS
Default status: Not specified
- affected: unspecified to < 14.0 (custom)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://support.apple.com/en-us/HT212147
- https://support.apple.com/en-us/HT212146
- https://support.apple.com/en-us/HT212148
- https://support.apple.com/en-us/HT212149
- https://support.apple.com/en-us/HT212152
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3L6ZZOU5JS7E3RFYGLP7UFLXCG7TNLU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JN6ZOD62CTO54CHTMJTHVEF6R2Y532TJ/
- https://security.gentoo.org/glsa/202104-03
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1789
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.13975,
"percentile": 0.96601
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.13975,
"percentile": 0.9658
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.13975,
"percentile": 0.96576
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.13975,
"percentile": 0.96574
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.13975,
"percentile": 0.96572
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.13975,
"percentile": 0.96567
}06 Nov 2026, 00:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
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}05 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.13975,
"percentile": 0.96564
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.13975,
"percentile": 0.96562
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.13975,
"percentile": 0.96555
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.13975,
"percentile": 0.9655
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2021-1789",
"cwes": [
"CWE-843"
],
"dateAdded": "2022-05-04",
"dueDate": "2022-05-25",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-1789",
"product": "Multiple Products",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "A type confusion issue affecting multiple Apple products allows processing of maliciously crafted web content, leading to arbitrary code execution.",
"vendorProject": "Apple",
"vulnerabilityName": "Apple Multiple Products Type Confusion Vulnerability"
}