Is CVE-2026-34805 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34805 being exploited in the wild.

How severe is CVE-2026-34805?

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-2026-34805?

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-2026-34805 attacked?

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

Am I affected by CVE-2026-34805?

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-2026-34805: Endian Firewall stored XSS in dnat.cgi remark parameter

CVE-2026-34805 · Severity: medium · CVSS 6.4 · Published 2026-04-02

Endian Firewall, a security appliance used to protect corporate networks, contains a vulnerability that allows an authenticated user to inject malicious scripts into the management interface. When an administrator or another user views the affected configuration page, these scripts can execute automatically in their browser. This could lead to unauthorized actions being performed on behalf of the administrator or the theft of sensitive session information.

Technologies: Endian Firewall Community. Vendors: Endian.

Quick answers

Is CVE-2026-34805 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34805 being exploited in the wild.
How severe is CVE-2026-34805?: 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-2026-34805?: 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-2026-34805 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-34805?: 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/dnat.cgi' component, specifically within the 'remark' parameter, which fails to properly neutralize user-supplied input before it is stored and rendered in the web interface. An attacker with low-privileged authenticated access can submit a malicious payload that will execute arbitrary JavaScript in the context of any user who subsequently views the DNAT configuration page. This can result in session hijacking or unauthorized configuration changes. The vulnerability is tracked as CVE-2026-34805.

Affected products

Endian Firewall 3.3.25 and prior

Timeline

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

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.