CVE-2025-43347Network attack vector

Unspecified impact via undisclosed input validation flaw

Published Sep 15, 2025 · Updated Sep 15, 2025

Input validation in the System component of Apple operating systems before 26 allows remote attackers to cause an unspecified impact. Apple has not disclosed the input locus, the invalid operation performed on it, or any resulting security consequence; it states only that vulnerable code was removed. CISA-ADP assesses network reachability without authentication or user interaction, but no public vendor material identifies a safe trigger or observable outcome.

CVSS severity9.8
Critical
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Input validation in the System component of Apple operating systems before 26 allows remote attackers to cause an unspecified impact. Apple has not disclosed the input locus, the invalid operation performed on it, or any resulting security consequence; it states only that vulnerable code was removed. CISA-ADP assesses network reachability without authentication or user interaction, but no public vendor material identifies a safe trigger or observable outcome.

The record

CVE
CVE-2025-43347
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-20
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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 <26

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <26
Apple · visionOSversion=unspecified <26
Apple · tvOSversion=unspecified <26
Apple · macOSversion=unspecified <26
Apple · watchOSversion=unspecified <26

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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-20Improper Input Validation

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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