Denial of service via integer overflow
Published Sep 14, 2026 · Updated Sep 14, 2026
Integer overflow in Apple macOS before 15.8, 26.7, and 27 allows attackers to interrupt service through network input. Apple reports that insufficient input validation permits the overflow but does not identify the affected component or input field. Reachability requires a privileged network position, and the reported consequence is denial of service without disclosed persistence or data impact.
Summary
What happened
Integer overflow in Apple macOS before 15.8, 26.7, and 27 allows attackers to interrupt service through network input. Apple reports that insufficient input validation permits the overflow but does not identify the affected component or input field. Reachability requires a privileged network position, and the reported consequence is denial of service without disclosed persistence or data impact.
The record
- CVE
- CVE-2026-84554
- Published
- Sep 14, 2026
- Updated
- Sep 14, 2026
- Vendor
- Apple
- Product
- macOS
- Classifications
- T1499
- Attack vector
- adjacent
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 14, 2026CVE publishedPublication date reported by the CVE source.
- Sep 14, 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 <15.8
- Affected versionversion=0 <26.7
- Affected versionversion=0 <27
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
Weakness, pattern, technique
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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