CVE-2026-43667: An attacker in a privileged network position may be able to cause a denial-of-service in Apple iOS and iPadOS
CVE-2026-43667 is a denial-of-service vulnerability affecting Apple iOS and iPadOS. The issue involves a reachable assertion that could be triggered by an attacker in a privileged network position, causing the affected device to become unavailable. Apple addressed this vulnerability with improved input validation in iOS and iPadOS versions 18.7.10 and 26.5, among other platforms. The vulnerability has a CVSS score of 6.5, indicating a medium severity level.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-43667) involves a reachable assertion in Apple iOS and iPadOS that could be exploited by an attacker positioned within a privileged network role to cause a denial-of-service condition. The flaw was mitigated by Apple through improved input validation. The fix is included in iOS and iPadOS versions 18.7.10 and 26.5, as well as macOS Tahoe 26.5, visionOS 26.5, and watchOS 26.5. The CVSS v3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, and high availability impact.
Potential Impact
An attacker with privileged network access could cause a denial-of-service on affected Apple devices running vulnerable versions of iOS and iPadOS. This results in service disruption but does not impact confidentiality or integrity of data.
Mitigation Recommendations
Apple has released official fixes for this vulnerability in iOS and iPadOS versions 18.7.10 and 26.5. Users and administrators should update affected devices to these versions or later to remediate the issue.
CVE-2026-43667: An attacker in a privileged network position may be able to cause a denial-of-service in Apple iOS and iPadOS
Description
CVE-2026-43667 is a denial-of-service vulnerability affecting Apple iOS and iPadOS. The issue involves a reachable assertion that could be triggered by an attacker in a privileged network position, causing the affected device to become unavailable. Apple addressed this vulnerability with improved input validation in iOS and iPadOS versions 18.7.10 and 26.5, among other platforms. The vulnerability has a CVSS score of 6.5, indicating a medium severity level.
CVSS v3.1
Score 6.5medium
Affected software
Apple
iOS and iPadOS
Apple
macOS
Apple
visionOS
Apple
watchOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-43667) involves a reachable assertion in Apple iOS and iPadOS that could be exploited by an attacker positioned within a privileged network role to cause a denial-of-service condition. The flaw was mitigated by Apple through improved input validation. The fix is included in iOS and iPadOS versions 18.7.10 and 26.5, as well as macOS Tahoe 26.5, visionOS 26.5, and watchOS 26.5. The CVSS v3.1 vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality or integrity impact, and high availability impact.
Potential Impact
An attacker with privileged network access could cause a denial-of-service on affected Apple devices running vulnerable versions of iOS and iPadOS. This results in service disruption but does not impact confidentiality or integrity of data.
Mitigation Recommendations
Apple has released official fixes for this vulnerability in iOS and iPadOS versions 18.7.10 and 26.5. Users and administrators should update affected devices to these versions or later to remediate the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.640Z
- State
- PUBLISHED
Threat ID: 6a838032bf8831d5399e4763
Added to database: 08/17/2026, 21:42:10 UTC
Last enriched: 09/12/2026, 00:32:40 UTC
Last updated: 10/02/2026, 02:46:04 UTC
Views: 47
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.