Is CVE-2026-34802 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34802 being exploited in the wild.

How severe is CVE-2026-34802?

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

Which products and versions are affected?

Endian Firewall Community up to and including 3.3.25.

Is there a fix for CVE-2026-34802?

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-2026-34802 attacked?

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

Am I affected by CVE-2026-34802?

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-2026-34802: Endian Firewall stored XSS in salearn.cgi

CVE-2026-34802 · Severity: medium · CVSS 6.4 · Published 2026-04-02

Endian Firewall, a security appliance used to protect corporate and community networks, contains a vulnerability in its administrative interface. An authorized user can upload malicious scripts that are saved on the device and then automatically run in the browsers of other administrators. This could allow a malicious insider to hijack administrative sessions or perform unauthorized actions on the firewall.

Technologies: Endian Firewall Community. Vendors: Endian.

Quick answers

Is CVE-2026-34802 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34802 being exploited in the wild.
How severe is CVE-2026-34802?: Medium severity, with a CVSS score of 6.4, published 2 April 2026.
Which products and versions are affected?: Endian Firewall Community up to and including 3.3.25.
Is there a fix for CVE-2026-34802?: 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-2026-34802 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-34802?: 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 flaw is located in the /cgi-bin/salearn.cgi component, which fails to properly neutralize user-supplied input in the 'remark', 'user', 'ham', and 'spam' parameters. An authenticated attacker with low privileges can submit a crafted request containing malicious JavaScript. This script is stored on the server and executed in the context of any user (typically an administrator) who later views the affected page. This can lead to session hijacking, unauthorized configuration changes, or further exploitation of the administrative interface.

Affected products

Endian Firewall Community up to and including 3.3.25

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.