CVE-2026-2039
CRITICALCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2Description
GFI Archiver MArc.Store Missing Authorization Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass authentication on affected installations of GFI Archiver. Authentication is not required to exploit this vulnerability. The specific flaw exists within the configuration of the MArc.Store.Remoting.exe process, which listens on port 8018. The issue results from the lack of authorization prior to allowing access to functionality. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of SYSTEM. Was ZDI-CAN-28597.
Analysis
Auth bypass in GFI Archiver via MArc.Store missing authorization. EPSS 0.59%.
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Remediation
Within 24 hours: Inventory all GFI Archiver deployments and isolate affected systems from untrusted networks; notify your incident response team and legal/compliance. Within 7 days: Implement network segmentation restricting MArc.Store access to authorized IPs only; enable enhanced logging and monitoring for unauthorized access attempts; begin vendor communication for patch timeline. …
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External POC / Exploit Code
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