CVE-2023-23517Network attack vector

Code execution via WebKit memory corruption

Published Feb 27, 2023 · Updated Mar 11, 2025

Memory corruption in WebKit in affected Apple operating systems and Safari allows remote attackers to execute code through malicious web content. Apple has not disclosed the specific WebKit routine or memory operation; its advisories state only that improved memory handling addressed the issue. Exploitation requires a user to process attacker-controlled web content, after which code executes in the affected WebKit context.

CVSS severity8.8
High
EPSS probability0.90%
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 WebKit in affected Apple operating systems and Safari allows remote attackers to execute code through malicious web content. Apple has not disclosed the specific WebKit routine or memory operation; its advisories state only that improved memory handling addressed the issue. Exploitation requires a user to process attacker-controlled web content, after which code executes in the affected WebKit context.

The record

CVE
CVE-2023-23517
Published
Feb 27, 2023
Updated
Mar 11, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-119, T1203, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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 <16.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <16.3
Apple · Safariversion=unspecified <16.3
Apple · tvOSversion=unspecified <16.3
Apple · macOSversion=unspecified <11.7; version=unspecified <12.6; version=unspecified <13.2
Apple · watchOSversion=unspecified <9.3

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NVDCVSS: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

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution
T1189Drive-by Compromise

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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