Is CVE-2026-93865 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-93865 being exploited in the wild.

How severe is CVE-2026-93865?

Informational severity, published 27 October 2026.

Which products and versions are affected?

Watchguard Fireware OS Default >=2025.1 =12.0 =12.0 <12.5.22.

How is CVE-2026-93865 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-93865?

Check whether you run Watchguard Fireware OS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-93865: WatchGuard Fireware OS authentication bypass in FireCluster daemon

Q: Is there a fix for CVE-2026-93865?

Yes: fixed in Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22. Until then: This vulnerability only affects Firebox appliances configured as a member of a FireCluster; disabling the clustering feature or ensuring FireCluster is not enabled mitigates the risk. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-93865 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-93865?

Check whether you run Watchguard Fireware OS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-93865 · Severity: info · Published 2026-10-27

WatchGuard Fireware OS is a firewall appliance that protects corporate networks. When configured as part of a FireCluster (redundancy and failover system), a missing authentication vulnerability in the cluster synchronization daemon allows an unauthenticated attacker on the network to execute privileged system commands, enabling full compromise of the firewall and any networks it protects.

Technologies: Watchguard Fireware OS. Vendors: Watchguard.

Quick answers

Is CVE-2026-93865 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-93865 being exploited in the wild.
How severe is CVE-2026-93865?: Informational severity, published 27 October 2026.
Which products and versions are affected?: Watchguard Fireware OS Default >=2025.1 <2026.4, >=12.0 <12.12.4; T15/T35 >=12.0 <12.5.22.
Is there a fix for CVE-2026-93865?: Yes: fixed in Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22. Until then: This vulnerability only affects Firebox appliances configured as a member of a FireCluster; disabling the clustering feature or ensuring FireCluster is not enabled mitigates the risk. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-93865 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-93865?: Check whether you run Watchguard Fireware OS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Fireware OS 2026.4, Fireware OS 12.12.4, Fireware OS 12.5.22

This vulnerability only affects Firebox appliances configured as a member of a FireCluster; disabling the clustering feature or ensuring FireCluster is not enabled mitigates the risk.

Technical details

A missing authentication vulnerability (CWE-306, CWE-862) in the FireCluster synchronization daemon allows remote, unauthenticated command injection (CWE-77) when a Firebox appliance is configured as a FireCluster member. An attacker sending a specially crafted request to the FireCluster management IP can invoke administrative system-level actions with no authentication required, leading to remote code execution as root.

Affected products

WatchGuard Fireware OS Default >=2025.1 <2026.4, >=12.0 <12.12.4; T15/T35 >=12.0 <12.5.22

Timeline

2026-10-27: disclosed

References

https://psirt.watchguard.com/CVE-2026-93865

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