Unauthenticated denial of service via login resource exhaustion
Published Sep 29, 2026 · Updated Sep 29, 2026
Resource exhaustion in Fireware OS wgagent login processing allows remote attackers to interrupt Firebox management via crafted requests. The login process consumes resources while handling attacker-controlled requests; the specific parsing or allocation error has not been published. An unauthenticated network path to the login interface is required, and the reported consequence is denial of service, not data access or code execution.
Summary
What happened
Resource exhaustion in Fireware OS wgagent login processing allows remote attackers to interrupt Firebox management via crafted requests. The login process consumes resources while handling attacker-controlled requests; the specific parsing or allocation error has not been published. An unauthenticated network path to the login interface is required, and the reported consequence is denial of service, not data access or code execution.
The record
- CVE
- CVE-2026-86104
- Published
- Sep 29, 2026
- Updated
- Sep 29, 2026
- Vendor
- WatchGuard Technologies
- Product
- Fireware OS
- Classifications
- T1499.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 29, 2026CVE publishedPublication date reported by the CVE source.
- Sep 29, 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=12.0 <12.12.3
- Affected versionversion=12.0 <12.5.21
- Affected versionversion=2025.0 <2026.2.3
- Affected versionversion=2026.3 <2026.3.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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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.
Activity data is delayed. The latest report is Sep 28, 2026.
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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