Is CVE-2026-34814 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34814 being exploited in the wild.

How severe is CVE-2026-34814?

Medium severity, with a CVSS score of 6.4, published 2 April 2026.

Which products and versions are affected?

Endian Firewall 3.3.25 and prior.

Is there a fix for CVE-2026-34814?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-34814 attacked?

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

Am I affected by CVE-2026-34814?

Check whether you run Endian Firewall Community. 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-2026-34814: Endian Firewall stored XSS in proxygroup.cgi

CVE-2026-34814 · Severity: medium · CVSS 6.4 · Published 2026-04-02

Endian Firewall, a security appliance used to protect corporate networks, is vulnerable to a security flaw in its management interface. An authorized user can inject malicious scripts into the system's configuration pages. When other administrators view these pages, the scripts could allow the attacker to perform unauthorized actions or steal sensitive session information.

Technologies: Endian Firewall Community. Vendors: Endian.

Quick answers

Is CVE-2026-34814 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34814 being exploited in the wild.
How severe is CVE-2026-34814?: Medium severity, with a CVSS score of 6.4, published 2 April 2026.
Which products and versions are affected?: Endian Firewall 3.3.25 and prior.
Is there a fix for CVE-2026-34814?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-34814 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-34814?: Check whether you run Endian Firewall Community. 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.

Technical details

A stored cross-site scripting (XSS) vulnerability exists in Endian Firewall versions up to and including 3.3.25. The flaw is located in the /cgi-bin/proxygroup.cgi component, which fails to properly neutralize user-supplied input in the 'group' parameter. An authenticated attacker with network access to the management interface can submit a specially crafted request containing malicious JavaScript. This script is stored on the server and subsequently executed in the browser of any user (typically an administrator) who visits the affected configuration page, potentially leading to session hijacking or unauthorized configuration changes.

Affected products

Endian Firewall 3.3.25 and prior

Timeline

2026-04-02: disclosed
2026-04-02: advisory

References

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