Is CVE-2026-34823 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34823 being exploited in the wild.

How severe is CVE-2026-34823?

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-2026-34823?

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-2026-34823 attacked?

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

Am I affected by CVE-2026-34823?

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-2026-34823: Endian Firewall stored XSS in remark parameter

CVE-2026-34823 · Severity: medium · CVSS 6.4 · Published 2026-04-02

Endian Firewall, a security appliance used to protect corporate and community networks, contains a vulnerability that allows an authenticated user to inject malicious scripts into the management interface. If an administrator or another user views the affected settings page, the script could execute in their browser, potentially leading to unauthorized actions or the theft of session information. This could compromise the integrity of the firewall management console.

Technologies: Endian Firewall Community. Vendors: Endian.

Quick answers

Is CVE-2026-34823 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34823 being exploited in the wild.
How severe is CVE-2026-34823?: 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-2026-34823?: 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-2026-34823 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-34823?: 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 '/manage/password/web/' endpoint, where the 'remark' parameter fails to properly neutralize user-supplied input. An authenticated attacker with low privileges can submit a malicious payload that is permanently stored on the server. When an administrative user subsequently accesses the affected page, the payload executes within the context of their session. This can be used to perform unauthorized configuration changes or hijack administrative sessions.

Affected products

Endian Firewall Community up to and including 3.3.25

Timeline

2026-04-02: disclosed: Initial disclosure by VulnCheck
2026-04-02: advisory: NVD publication date

References

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