CVE-2026-66745
Received Received - Intake

Session Fixation in Artica Proxy

Publication date: 2026-07-28

Last updated on: 2026-07-28

Assigner: VulnCheck

Description
Artica Proxy before 4.50.000000 Service Pack 7 (fixed in hotfix 20260724-02) contains a session fixation vulnerability that allows unauthenticated attackers to hijack administrative sessions by setting a known PHPSESSID on a victim's browser prior to authentication. Attackers can pre-set a controlled session identifier and wait for a victim to authenticate through fw.login.php, after which the attacker gains a fully authenticated administrative session on port 9000.

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Meta Information

Published
2026-07-28
Last Modified
2026-07-28
Generated
2026-07-29
AI Q&A
2026-07-28
EPSS Evaluated
N/A
NVD
CVE-2026-66745
EUVD
EUVD-2026-49955

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
artica proxy to 4.50.000000000 (exc)
artica proxy to 4.50.000000 (exc)
artica proxy From 4.50.000000 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

Attack-Flow Graph

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Executive Summary

This is a session fixation vulnerability in Artica Proxy versions before 4.50.000000 Service Pack 7. An unauthenticated attacker can set a known PHPSESSID in a victim's browser before they authenticate. When the victim logs in via fw.login.php, the attacker gains full administrative access on port 9000.

Detection Guidance

To detect this vulnerability, monitor network traffic for unauthorized administrative sessions on port 9000. Check for repeated PHPSESSID values before and after authentication attempts via fw.login.php. Inspect logs for suspicious session fixation patterns where attackers pre-set session identifiers.

Impact Analysis

An attacker could hijack an administrator's session, gaining full control over the Artica Proxy system. This could lead to unauthorized configuration changes, data access, or network manipulation. The impact includes potential data breaches, system compromise, and loss of confidentiality and integrity.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection requirements and HIPAA's security rules. Organizations using affected Artica Proxy versions may face compliance violations, potential fines, and reputational damage due to compromised data integrity and confidentiality.

Mitigation Strategies

Apply the hotfix 20260724-02 for Service Pack 7 or upgrade to Artica Proxy 4.50.000000 Service Pack 7. Ensure all administrative sessions are terminated after applying the fix. Monitor for any ongoing unauthorized access attempts.

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