Endian Firewall 3.3.25 Parameter fixed_leases remark cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.77-

Summaryinfo

A vulnerability was found in Endian Firewall 3.3.25. It has been classified as problematic. Affected by this issue is some unknown functionality of the file /manage/dhcp/fixed_leases/ of the component Parameter Handler. The manipulation of the argument remark leads to cross site scripting. This vulnerability is referenced as CVE-2026-34801. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Endian Firewall 3.3.25. It has been rated as problematic. This issue affects an unknown code block of the file /manage/dhcp/fixed_leases/ of the component Parameter Handler. The manipulation of the argument remark with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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

The weakness was published by Alex Williams. The advisory is shared at help.endian.com. The identification of this vulnerability is CVE-2026-34801 since 03/30/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.4
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/30/2026 CVE reserved
04/02/2026 +3 days Advisory disclosed
04/02/2026 +0 days VulDB entry created
04/02/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: help.endian.com
Researcher: Alex Williams
Status: Confirmed

CVE: CVE-2026-34801 (🔒)
GCVE (CVE): GCVE-0-2026-34801
GCVE (VulDB): GCVE-100-354905

Entryinfo

Created: 04/02/2026 17:30
Changes: 04/02/2026 17:30 (79)
Complete: 🔍
Cache ID: 216:652:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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