EUVD-2026-67329
GHSA-48wp-98wm-5fpp
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable management UI requires administrator credentials (PR:H, AV:N); out-of-bounds write with RCE/DoS potential yields full C/I/A on the vulnerable system with no scope change.
Primary rating from Vendor (WatchGuard).
CVSS VectorVendor: WatchGuard
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.
AnalysisAI
Buffer overflow in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to trigger a denial-of-service condition or potentially execute arbitrary code by submitting specially crafted traffic to the management interface. The root cause is CWE-787 (out-of-bounds write) in the web-based management component, and the CVSS 4.0 vector confirms network reachability with high-privilege authentication as prerequisites. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated administrator account on the WatchGuard Fireware OS Management Web UI, confirmed by the CVSS 4.0 PR:H metric - this is not exploitable by unauthenticated or low-privileged users. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.6 reflects substantial impact potential (VC:H/VI:H/VA:H) constrained by the high privilege requirement (PR:H), meaning an attacker must first hold valid administrator credentials - a non-trivial precondition that sharply limits the realistic attacker population. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult the WatchGuard PSIRT advisory at https://psirt.watchguard.com/CVE-2026-78008 for the specific patched Fireware OS release; the available data does not confirm an exact fix version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit current administrator accounts and their access patterns to the WatchGuard management interface; document all legitimate administrative users and their typical access locations. …
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External POC / Exploit Code
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