CVE-2026-78011
Fireware OS Integer Underflow in Iked Allows Unauthenticated Denial of Service (DoS)
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
An integer underflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.
| CWE | CWE-191 CWE-787 |
| Vendor | watchguard |
| Product | fireware os |
| Published | Aug 27, 2026 |
Stay Ahead of the Next One
Get instant alerts for watchguard fireware os
Be the first to know when new unknown vulnerabilities affecting watchguard fireware os are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
WatchGuard / Fireware OS
2025.0 < 2026.2.2 12.0 < 12.12.2
WatchGuard / Fireware OS
12.0 < 12.5.20
References
Credits
Discovered Internally by WatchGuard AI Security Research