CVE-2021-30942Public exploit

Arbitrary code execution via malformed ICC profiles

Published Aug 24, 2021 · Updated Aug 3, 2024

Memory corruption in Apple ColorSync on iOS, iPadOS, macOS, and watchOS allows attackers to execute code via a crafted image. ColorSync inadequately validates ICC profile data during image parsing and corrupts memory; Apple has not disclosed the specific parser operation. A user or application must process the image, after which code runs in the context of the image-processing process.

CVSS severity7.8
High
EPSS probability1.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Apple ColorSync on iOS, iPadOS, macOS, and watchOS allows attackers to execute code via a crafted image. ColorSync inadequately validates ICC profile data during image parsing and corrupts memory; Apple has not disclosed the specific parser operation. A user or application must process the image, after which code runs in the context of the image-processing process.

The record

CVE
CVE-2021-30942
Published
Aug 24, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <15.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <15.2
Apple · macOSversion=unspecified <11.6; version=unspecified <12.1; version=unspecified <15.2; version=unspecified <2021
Apple · watchOSversion=unspecified <8.3

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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