CVE-2025-43501Network attack vector

Process crash via WebKit buffer overflow

Published Dec 17, 2025 · Updated Dec 17, 2025

Buffer overflow in WebKit in Safari and affected Apple operating systems allows remote attackers to crash a process via crafted web content. Apple identifies the faulty locus only as WebKit and has not disclosed the affected routine or the unchecked memory operation that overruns its buffer. Exploitation requires a user to process attacker-controlled web content, and the documented consequence is an unexpected process crash rather than code execution.

CVSS severity4.3
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in WebKit in Safari and affected Apple operating systems allows remote attackers to crash a process via crafted web content. Apple identifies the faulty locus only as WebKit and has not disclosed the affected routine or the unchecked memory operation that overruns its buffer. Exploitation requires a user to process attacker-controlled web content, and the documented consequence is an unexpected process crash rather than code execution.

The record

CVE
CVE-2025-43501
Published
Dec 17, 2025
Updated
Dec 17, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-120, CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 17, 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 <18.7
  2. Affected versionversion=unspecified <26.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <18.7; version=unspecified <26.2
Apple · visionOSversion=unspecified <26.2
Apple · Safariversion=unspecified <26.2
Apple · macOSversion=unspecified <26.2

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787Out-of-bounds Write
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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