CVE-2023-42852Network attack vector

Code execution via undisclosed WebKit logic flaw

Published Oct 25, 2023 · Updated May 5, 2025

Code execution in WebKit in affected iOS, iPadOS, macOS, watchOS, tvOS, and Safari releases allows remote attackers to run code. Apple identifies a logic error addressed by improved checks but does not disclose the faulty WebKit check or the input condition it mishandles. Exploitation requires a user to load attacker-controlled web content, and successful execution runs within the affected WebKit process context.

CVSS severity8.8
High
EPSS probability1.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in WebKit in affected iOS, iPadOS, macOS, watchOS, tvOS, and Safari releases allows remote attackers to run code. Apple identifies a logic error addressed by improved checks but does not disclose the faulty WebKit check or the input condition it mishandles. Exploitation requires a user to load attacker-controlled web content, and successful execution runs within the affected WebKit process context.

The record

CVE
CVE-2023-42852
Published
Oct 25, 2023
Updated
May 5, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 25, 2023CVE publishedPublication date reported by the CVE source.
  2. May 5, 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 <16.7
  2. Affected versionversion=unspecified <17.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <16.7; version=unspecified <17.1
Apple · Safariversion=unspecified <17.1
Apple · tvOSversion=unspecified <17.1
Apple · macOSversion=unspecified <14.1
Apple · watchOSversion=unspecified <10.1

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

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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