Is CVE-2026-34810 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34810 being exploited in the wild.

How severe is CVE-2026-34810?

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-2026-34810?

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-2026-34810 attacked?

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

Am I affected by CVE-2026-34810?

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-2026-34810: Endian Firewall stored XSS in vpnfw.cgi remark parameter

CVE-2026-34810 · Severity: medium · CVSS 6.4 · Published 2026-04-02

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

Technologies: Endian Firewall Community. Vendors: Endian.

Quick answers

Is CVE-2026-34810 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34810 being exploited in the wild.
How severe is CVE-2026-34810?: 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-2026-34810?: 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-2026-34810 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-34810?: 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 (Community edition) versions up to and including 3.3.25. The flaw is located in the /cgi-bin/vpnfw.cgi component, which fails to properly neutralize user-supplied input in 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 user or administrator subsequently accesses the VPN firewall configuration page, the injected JavaScript executes within the context of their session. This can be used to bypass same-origin policy protections or perform administrative actions.

Affected products

Endian Firewall Community up to and including 3.3.25

Timeline

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

References

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