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CVE-2021-1782

Apple Multiple Products Race Condition

7.0 HIGHActively exploited (CISA KEV)EPSS 2.22%
  1. Published2 Apr 2021
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due17 Nov 2021
Actively exploited (CISA KEV)

Apple iOS, iPadOs, macOS, watchOS, and tvOS contain a race condition vulnerability that may allow a malicious application to elevate privileges.

Added to KEV: 3 Nov 2021Federal remediation due: 17 Nov 2021

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..

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityHigh
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Apple iPadOS< 14.4
Apple iPhone OS< 14.4
Apple macOS≥ 11.0 < 11.2
Apple Mac OS X≥ 10.14 < 10.14.6 · ≥ 10.15 < 10.15.7 · 10.14.6 · 10.15.7
Apple Tvos< 14.4
Apple Watchos< 7.3

Remediation

Fixed in
Apple iPadOS≥ 14.4
Apple iPhone OS≥ 14.4
Apple macOS≥ 11.2
Apple Mac OS X≥ 10.14.6
Apple Tvos≥ 14.4
Apple Watchos≥ 7.3

References

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Frequently asked

Is CVE-2021-1782 being actively exploited?

Yes. CVE-2021-1782 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2021-1782?

CVE-2021-1782 has a CVSS 3.1 base score of 7.0, rated high. EPSS estimates a 2.22% probability of exploitation.

Which products are affected by CVE-2021-1782?

Affected products include Apple iPadOS, Apple iPhone OS, Apple macOS, Apple Mac OS X, Apple Tvos, and 1 more.

How do I fix CVE-2021-1782?

Upgrade affected software to a fixed version, for example Apple iPadOS 14.4, Apple iPhone OS 14.4, Apple macOS 11.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-1782 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.