CVE-2026-86104
HIGHCVSS 7.5/10EPSS 0.36%
Last modified
CVE-2026-86104 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An uncontrolled resource consumption vulnerability in the Fireware OS login process (wgagent) allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted request.. EPSS estimates a 0.36% chance of exploitation in the next 30 days.
Description
An uncontrolled resource consumption vulnerability in the Fireware OS login process (wgagent) allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted request.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Watchguard | Fireware | >= 12.0, < 12.5.21 |
| Watchguard | Fireware | >= 12.12, < 12.12.3 |
| Watchguard | Fireware | >= 2025.0, < 2026.2.3 |
| Watchguard | Fireware | >= 2026.3, < 2026.3.2 |
References
- https://psirt.watchguard.com/CVE-2026-86104Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-86104?
An uncontrolled resource consumption vulnerability in the Fireware OS login process (wgagent) allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted request.
How severe is CVE-2026-86104?
CVE-2026-86104 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.
How do I fix CVE-2026-86104?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-86098ntop nDPI versions before 6.0 contain a heap buffer overflow…7.4
- CVE-2026-86099Chainlit through 2.12.0 fails to validate the client-supplie…8.2
- CVE-2026-8610The TypeSquare Webfonts for ConoHa plugin for WordPress is v…4.3
- CVE-2026-86100Camaleon CMS versions 2.7.5 through 2.9.1 fail to validate r…6.4
- CVE-2026-86101An improper authorization vulnerability in WatchGuard Firewa…6.5
- CVE-2026-86102An OS command injection vulnerability in the WatchGuard AP i…9.3
- CVE-2026-86105An improper authorization vulnerability in Fireware OS's Acc…7.1
- CVE-2026-86106An unauthenticated actor with network access to the private …9.6
- CVE-2026-86107The VeloCloud Edge and Gateway exhibit an out-of-bounds writ…5.9
- CVE-2026-86108Insufficient validation of inputs supplied through affected …8
- CVE-2026-86109The VeloCloud Edge software update workflow may accept updat…6.6
- CVE-2026-8611The Klamra Paycal for Aspaclaria plugin for WordPress is vul…4.3
Are you affected by CVE-2026-86104?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST