CVE-2025-31273Network attack vector

Memory corruption via crafted web content

Published Jul 29, 2025 · Updated Apr 2, 2026

Memory corruption in WebKit in affected Apple operating systems and Safari allows remote attackers to corrupt memory via crafted web content. Apple identifies WebKit as the affected component but has not disclosed the specific memory-handling operation or input field that exceeds its intended buffer boundary. A user must process attacker-controlled web content; the published record supports process-memory corruption but does not confirm code execution.

CVSS severity8.8
High
EPSS probability1.11%
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 corrupt memory via crafted web content. Apple identifies WebKit as the affected component but has not disclosed the specific memory-handling operation or input field that exceeds its intended buffer boundary. A user must process attacker-controlled web content; the published record supports process-memory corruption but does not confirm code execution.

The record

CVE
CVE-2025-31273
Published
Jul 29, 2025
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-119, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <18.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <18.6
Apple · visionOSversion=0 <2.6
Apple · Safariversion=0 <18.6
Apple · tvOSversion=0 <18.6
Apple · macOSversion=0 <15.6
Apple · watchOSversion=0 <11.6

Published CVSS scores

8.8CISA-ADPCVSS: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 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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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