# CVE-2026-93434: WatchGuard Fireware OS XPath injection in SSH authentication

Source: https://junglewise.ai/threats/cve-2026-93434-an-xpath-injection-vulnerability-in-watchguard-fireware-os-s-ssh  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-93434 · Severity: info · Published 2026-10-27

WatchGuard Fireware OS is a firewall operating system used to protect networks. An XPath injection flaw in its SSH management interface allows an unauthenticated attacker with network access to this interface to extract sensitive configuration data. This could expose firewall settings, credentials, and security policies that an attacker could use to compromise the protected network.

Technologies: [Watchguard Fireware OS](https://junglewise.ai/threats/technologies/fireware-os). Vendors: [Watchguard](https://junglewise.ai/threats/vendors/watchguard).

## Quick answers

**Is CVE-2026-93434 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93434 being exploited in the wild.

**How severe is CVE-2026-93434?** Informational severity, published 27 October 2026.

**Which products and versions are affected?** Watchguard Fireware OS 12.0 to 12.5.21, 2025.1 to 2026.3, 12.0 to 12.12.3.

**Is there a fix for CVE-2026-93434?** Yes: fixed in Fireware OS 12.5.22, Fireware OS 2026.4, Fireware OS 12.12.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-93434 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-93434?** 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 12.5.22, Fireware OS 2026.4, Fireware OS 12.12.4

## Technical details

An XPath injection vulnerability (CWE-643) exists in the SSH authentication process of WatchGuard Fireware OS where user input is not properly validated before being used in XPath expressions. An unauthenticated remote attacker with network access to the management SSH interface can submit specially crafted requests to perform blind extraction of configuration secrets, exploiting observable timing discrepancies in the authentication responses.

## Affected products

- WatchGuard Fireware OS 12.0 to 12.5.21, 2025.1 to 2026.3, 12.0 to 12.12.3

## Timeline

- 2026-10-27: disclosed
- 2026-10-27: advisory

## References

- [https://psirt.watchguard.com/CVE-2026-93434](https://psirt.watchguard.com/CVE-2026-93434)

## Related threats

- [WatchGuard Fireware OS integer overflow in WebSocket Access Portal](https://junglewise.ai/threats/cve-2026-93866-an-integer-overflow-vulnerability-in-the-websocket-connection)
- [WatchGuard Fireware OS authentication bypass in FireCluster daemon](https://junglewise.ai/threats/cve-2026-93865-a-missing-authentication-vulnerability-in-the-fireware-os)
- [WatchGuard Fireware OS arbitrary file overwrite via link following](https://junglewise.ai/threats/cve-2026-93864-a-link-following-vulnerability-in-watchguard-fireware-os-s)
- [WatchGuard Fireware OS out-of-bounds read in FireCluster Sync](https://junglewise.ai/threats/cve-2026-93862-an-out-of-bounds-read-vulnerability-in-the-firecluster-sync)
- [WatchGuard Fireware OS stack buffer overflow in SIP proxy](https://junglewise.ai/threats/cve-2026-93857-a-stack-based-buffer-overflow-vulnerability-in-fireware-os-s-sip)