CVE-2021-30883

HIGH

7.8

CVSS Score

Published: August 24, 2021 at 06:49 PM UTC

Updated: June 17, 2026 at 03:51 AM UTC

5 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

HIGH7.8

Exploitation

CISA KEV

Exploit prediction

EPSS 15%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score14.7%

EPSS (Exploit Prediction Scoring System) estimates a 14.7% chance this CVE is exploited in the wild within the next 30 days — higher than 97% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Apple iOS, macOS, watchOS, and tvOS contain a memory corruption vulnerability that could allow for remote code execution.

Required Action

Apply updates per vendor instructions.

Ransomware Use

Unknown

Added to KEV

May 23, 2022

Remediation Due

Jun 13, 2022

1600 days overdue

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-30883

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..

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS · Apple

95%

v < 14.8v < 14.8.1v < 15.015.0 ≤ v < 15.0.2

Affected range stops below 14.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.8.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.0.2, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 14.8.115.0 ≤ v < 15.0.2

Affected range stops below 14.8.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.0.2, so it looks safe — our inference, not a vendor statement

macOS · Apple

95%

v < 11.6v < 12.0v < 15.1v < 8.111.0 ≤ v < 11.6.112.0

Affected range stops below 11.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 11.6.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.0, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.1, so it looks safe — our inference, not a vendor statement

tvOS · Apple

95%

v < 15.1

Affected range stops below 15.1, so it looks safe — our inference, not a vendor statement

watchOS · Apple

95%

v < 8.1

Affected range stops below 8.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references