CVE-2023-42839

Sensitive data disclosure via sandbox state mishandling

Published Feb 21, 2024 · Updated Nov 4, 2025

Sandbox isolation failure in Apple iOS, iPadOS, tvOS, watchOS, and macOS allows local users to read sensitive user data. The Sandbox component mishandles security state, allowing an application to cross an intended data-access boundary; Apple has not disclosed the affected state or code path. Execution of an application on an affected device is required, and the reported consequence is limited to unauthorized access to sensitive user data.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox isolation failure in Apple iOS, iPadOS, tvOS, watchOS, and macOS allows local users to read sensitive user data. The Sandbox component mishandles security state, allowing an application to cross an intended data-access boundary; Apple has not disclosed the affected state or code path. Execution of an application on an affected device is required, and the reported consequence is limited to unauthorized access to sensitive user data.

The record

CVE
CVE-2023-42839
Published
Feb 21, 2024
Updated
Nov 4, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-922, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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 <17.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <17.1
Apple · tvOSversion=unspecified <17.1
Apple · macOSversion=unspecified <14.1
Apple · watchOSversion=unspecified <10.1

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
6.2CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-922Insecure Storage of Sensitive Information
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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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