CVE-2026-34809

MEDIUM 6.4

Endian Firewall /cgi-bin/zonefw.cgi remark Stored Cross-Site Scripting

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting (XSS) via the remark parameter to /cgi-bin/zonefw.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page.

CWE	CWE-79
Vendor	endian
Product	endian firewall
Published	Apr 2, 2026
Last Updated	Apr 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

Endian / Endian Firewall

3.3.25

References

NVD ↗ CVE.org ↗ EPSS Data ↗

help.endian.com: https://help.endian.com/hc/en-us/sections/360004371358-Community vulncheck.com: https://www.vulncheck.com/advisories/endian-firewall-cgi-bin-zonefw-cgi-remark-stored-cross-site-scripting

Credits

Alex Williams from Pellera Technologies VulnCheck