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ExploitedIn CISA KEVFix available

CVE-2021-1782

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

  • Published2021-04-02
  • Fixed in10.15.7 · 10.14.6
  • WeaknessCWE-667

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 race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..

Timeline

dates in UTC
  1. 2021-04-0218:15CVE 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. 2024-02-0918:10SSVC exploitation set to activeCISA-ADP

Versions per branch

NVD
Apple mac os x
BranchAffectedFixed in
10.15≥ 10.15, < 10.15.710.15.7
10.14≥ 10.14, < 10.14.610.14.6
10.14= 10.14.6no fix published
10.15= 10.15.7no fix published
Apple ipados
BranchAffectedFixed in
14.4< 14.414.4
Apple iphone os
BranchAffectedFixed in
14.4< 14.414.4

3 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 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
    • < 7.3fixed in 7.3custom
  • Apple macOS
    Affected
    • < 14.4fixed in 14.4custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2021-04-02

Fix

  1. Update Apple mac os x to 10.15.7 · 10.14.6
  2. CISA’s required action: Apply updates per vendor instructions.due 2021-11-17

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
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

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2021-04-02
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-22jf-974v-hf7j

Frequently asked questions

What is CVE-2021-1782?

A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..

Is CVE-2021-1782 actively exploited?

Yes. CVE-2021-1782 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-2021-1782?

CVE-2021-1782 has a CVSS v3 base score of 7 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record