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ExploitedIn CISA KEVFix available

CVE-2021-30883

Exploitation confirmed. First attested on 2022-05-23 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2021-08-24
  • Fixed in15.0.2 · 14.8.1
  • WeaknessCWE-787

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 memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..

Timeline

dates in UTC
  1. 2021-08-2419:15CVE publishedNVD
  2. 2022-05-23Added to the CISA KEV catalogCISA KEV
  3. 2022-05-23Listed as exploited by GCVEGCVE
  4. 2022-05-23Exploitation first reportedCISA KEV
  5. 2025-01-2917:29SSVC exploitation set to activeCISA-ADP

Versions per branch

NVD
Apple ipados
BranchAffectedFixed in
15.0≥ 15.0, < 15.0.215.0.2
14.8< 14.8.114.8.1
Apple iphone os
BranchAffectedFixed in
15.0≥ 15.0, < 15.0.215.0.2
14.8< 14.8.114.8.1
Apple macos
BranchAffectedFixed in
11.x≥ 11.0, < 11.6.111.6.1
12.0= 12.0no fix published

2 more products 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 CNA6 products

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

  • Apple iOS and iPadOS
    Affected
    • < 15.0fixed in 15.0custom
  • Apple iOS and iPadOS
    Affected
    • < 14.8fixed in 14.8custom
  • Apple macOS
    Affected
    • < 12.0fixed in 12.0custom
  • Apple macOS
    Affected
    • < 11.6fixed in 11.6custom
  • Apple macOS
    Affected
    • < 8.1fixed in 8.1custom
  • Apple macOS
    Affected
    • < 15.1fixed in 15.1custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2021-10-28

Fix

  1. Update Apple ipados to 15.0.2 · 14.8.1
  2. CISA’s required action: Apply updates per vendor instructions.due 2022-06-13

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-05-23
Patch Due Date
2022-06-13
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

  • CISA KEVKEV entry2022-05-23
  • ENISA EUVDexploitation2022-05-232022-05-23
  • GCVEexploitation2022-05-23
  • CISA-ADPSSVC decisionactive2025-01-29
  • 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-7872025-01-29
  • NVDweakness (CWE)CWE-787read 2026-10-23
  • FIRST EPSSEPSS score14.7 %read 2026-11-04

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-2021-30883?

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..

Is CVE-2021-30883 actively exploited?

Yes. CVE-2021-30883 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 2022-06-13.

What is the CVSS score for CVE-2021-30883?

CVE-2021-30883 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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