Network-setting modification via undisclosed CFNetwork validation flaw
Published Jul 29, 2025 · Updated Apr 2, 2026
Improper input validation in CFNetwork across affected Apple operating systems allows remote attackers to modify restricted network settings. Apple states that CFNetwork required improved input validation but has not disclosed the relevant input, parser, or failed validation operation. No account or user action is required; published evidence limits the consequences to availability loss and unauthorized network-setting modification.
Summary
What happened
Improper input validation in CFNetwork across affected Apple operating systems allows remote attackers to modify restricted network settings. Apple states that CFNetwork required improved input validation but has not disclosed the relevant input, parser, or failed validation operation. No account or user action is required; published evidence limits the consequences to availability loss and unauthorized network-setting modification.
The record
- CVE
- CVE-2025-43223
- Published
- Jul 29, 2025
- Updated
- Apr 2, 2026
- Vendor
- Apple
- Product
- iOS and iPadOS
- Classifications
- CWE-20, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 29, 2025CVE publishedPublication date reported by the CVE source.
- Apr 2, 2026Record 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.
- Affected versionversion=0 <18.6
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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