Is CVE-2026-34815 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34815 being exploited in the wild.

How severe is CVE-2026-34815?

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-2026-34815?

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-2026-34815 attacked?

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

Am I affected by CVE-2026-34815?

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-2026-34815: Endian Firewall stored XSS in smtpdomains.cgi

CVE-2026-34815 · 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 with low-level access can inject malicious scripts into the system's configuration pages. These scripts are then executed when other administrators view the affected settings, potentially leading to unauthorized actions or the theft of sensitive session information.

Technologies: Endian Firewall Community. Vendors: Endian.

Quick answers

Is CVE-2026-34815 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34815 being exploited in the wild.
How severe is CVE-2026-34815?: 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-2026-34815?: 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-2026-34815 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-34815?: 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/smtpdomains.cgi component, which fails to properly neutralize user-supplied input provided via the DOMAIN parameter. An authenticated attacker with network access can submit a malicious payload that is permanently stored on the server. When an unsuspecting user (such as another administrator) accesses the SMTP domains configuration page, the malicious JavaScript executes in the context of their browser session. This can be used to hijack sessions, modify configurations, or perform actions on behalf of the victim user.

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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