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ExploitedIn CISA KEVFix available

CVE-2021-30869

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2021-08-24
  • WeaknessCWE-843

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.

Timeline

dates in UTC
  1. 2021-08-2419:15CVE publishedNVD
  2. 2021-11-03Added to the CISA KEV catalogCISA KEV
  3. 2021-11-03Listed as exploited by GCVEGCVE
  4. 2021-11-03Exploitation first reportedCISA KEV
  5. 2025-01-2917:30SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-30869?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-30869?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Apple mac os x
BranchAffectedFixed in
10.14≥ 10.14, ≤ 10.14.6no fix published
10.15≥ 10.15, ≤ 10.15.6no fix published
10.14= 10.14.6no fix published
10.15= 10.15.7no fix published
Apple iphone os
BranchAffectedFixed in
14.x≥ 14.0, < 14.414.4
12.x≥ 12.0, < 12.5.512.5.5
Apple ipados
BranchAffectedFixed in
14.4< 14.414.4

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA4 products

As apple, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apple iOS and iPadOS
    Affected
    • < 14.4fixed in 14.4custom
  • Apple macOS
    Affected
    • < 11.2fixed in 11.2custom
  • Apple macOS
    Affected
    • < 12.5fixed in 12.5custom
  • Apple macOS
    Affected
    • < 2021fixed in 2021custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2021-10-19

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2021-11-17

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2021-11-03
Patch Due Date
2021-11-17
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

  • CISA KEVKEV entry2021-11-03
  • ENISA EUVDexploitation2021-11-032021-11-03
  • GCVEexploitation2021-11-03
  • CISA-ADPSSVC decisionactive2025-01-29
  • OpenCVESSVC decisionactive—
  • CISA-ADPCVSS 3.17.82025-01-29
  • NVDCVSS 3.17.8read 2026-10-23
  • NVDCVSS 2.09.3read 2026-10-23
  • CISA-ADPweakness (CWE)CWE-8432025-01-29
  • NVDweakness (CWE)CWE-843read 2026-10-23
  • FIRST EPSSEPSS score4.2 %2026-11-03

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-08-24
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2021-30869?

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.

Is CVE-2021-30869 actively exploited?

Yes. CVE-2021-30869 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2021-11-17.

What is the CVSS score for CVE-2021-30869?

CVE-2021-30869 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record