CVE-2026-78009

8.7 highEPSS 0.5%

High (8.7). EPSS 0.5% chance of exploitation in the next 30 days.

An out-of-bounds read 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.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 45% of CVEs (scores of 2026-10-31)
CWEs: CWE-20, CWE-125
Published: 2026-08-28
Modified: 2026-09-03
Record from: the NVD, synced 2026-10-19

References

https://psirt.watchguard.com/CVE-2026-78009

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