Is CVE-2026-34808 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34808 being exploited in the wild.

How severe is CVE-2026-34808?

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

Which products and versions are affected?

Endian Firewall Community 3.3.25 and prior.

Is there a fix for CVE-2026-34808?

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-2026-34808 attacked?

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

Am I affected by CVE-2026-34808?

Check whether you run Endian Firewall Community 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-2026-34808: Endian Firewall stored XSS in outgoingfw.cgi remark parameter

CVE-2026-34808 · Severity: medium · CVSS 6.4 · Published 2026-04-02

Endian Firewall, a security appliance used to protect network perimeters, is vulnerable to a security flaw in its management interface. An authorized user with low-level access can inject malicious scripts into the firewall's configuration settings. These scripts will run in the browser of any other administrator who views the affected settings page, potentially allowing the attacker to hijack administrative sessions or perform unauthorized actions.

Technologies: Endian Firewall Community. Vendors: Endian.

Quick answers

Is CVE-2026-34808 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34808 being exploited in the wild.
How severe is CVE-2026-34808?: Medium severity, with a CVSS score of 6.4, published 2 April 2026.
Which products and versions are affected?: Endian Firewall Community 3.3.25 and prior.
Is there a fix for CVE-2026-34808?: 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-2026-34808 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-34808?: Check whether you run Endian Firewall Community 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.

Technical details

A stored cross-site scripting (XSS) vulnerability exists in Endian Firewall version 3.3.25 and earlier. The vulnerability is located in the '/cgi-bin/outgoingfw.cgi' component and is triggered by insufficient sanitization of the 'remark' parameter. An authenticated attacker with network access to the management interface can submit a malicious payload that is permanently stored on the server. When an unsuspecting administrator subsequently accesses the firewall's outgoing rules page, the malicious JavaScript executes within the context of their session. This can lead to session hijacking, unauthorized configuration changes, or further exploitation of the administrative interface.

Affected products

Endian Firewall Community 3.3.25 and prior

Timeline

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

References

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