Patchfirst
CVE-2026-90465 Critical · 9.4 EPSS 0.2%

A missing authentication vulnerability in the FireCluster Sync processing allows an attacker positioned on the cluster…

WatchGuard · Fireware OS

Summary

A missing authentication flaw in the FireCluster Sync processing of WatchGuard Fireware OS lets an attacker invoke privileged firewall management actions as root by sending a specially crafted request. The attacker must be positioned on the cluster interconnect, such as a compromised cluster peer or an on-path network attacker, and requires no privileges or user interaction.

Official description · NVD

A missing authentication vulnerability in the FireCluster Sync processing allows an attacker positioned on the cluster interconnect, such as a compromised cluster peer or an on-path network attacker, to invoke privileged firewall management actions as root by sending a specially crafted request.

Breakdown
10.9 / 100
Exploited
Not confirmed
Reports
0
Tactics
0/15

Disclosed on 27 Oct 2026. No public exploit code or confirmed exploitation is recorded.

techniques

No techniques linked

No ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.

What security researchers reported

Not named in any threat report yet

Also mentioned in 3 community threat pulses (AlienVault OTX)

Weaker evidence

Pulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.

References

1 link, grouped by NVD tag
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