CVE-2023-23529Known exploitationNetwork attack vector

Code execution via WebKit type confusion

Published Feb 27, 2023 · Updated Oct 21, 2025

Type confusion in Apple WebKit allows remote attackers to execute arbitrary code through malicious web content on iOS, iPadOS, macOS, and Safari. WebKit processes a crafted value as an incompatible runtime type; Apple has not disclosed the affected function or exact missing type check. A user must cause WebKit to process attacker-controlled content, and CISA lists the flaw as known exploited.

CVSS severity8.8
High
EPSS probability9.50%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in Apple WebKit allows remote attackers to execute arbitrary code through malicious web content on iOS, iPadOS, macOS, and Safari. WebKit processes a crafted value as an incompatible runtime type; Apple has not disclosed the affected function or exact missing type check. A user must cause WebKit to process attacker-controlled content, and CISA lists the flaw as known exploited.

The record

CVE
CVE-2023-23529
Published
Feb 27, 2023
Updated
Oct 21, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-843, T1189, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2023Exploitation reportedCISA Known Exploited Vulnerabilities listing
  2. Feb 27, 2023CVE publishedPublication date reported by the CVE source.
  3. Oct 21, 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 <15.7
  2. Affected versionversion=unspecified <16.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <15.7; version=unspecified <16.3
Apple · Safariversion=unspecified <16.3
Apple · macOSversion=unspecified <13.2

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 exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1189Drive-by Compromise
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.

Reported exploitation

Technologies

Your stack

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Your stack

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