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Archiver CVE-2026-2039

CRITICAL
Missing Authorization (CWE-862)
2026-02-20 zdi-disclosures@trendmicro.com
Authentication Bypass Archiver
9.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:04 vuln.today
CVE Published
Feb 20, 2026 - 23:16 nvd
CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

Auth bypass in GFI Archiver via MArc.Store missing authorization. EPSS 0.59%.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Connect to MArc.Store.Remoting.exe port 8018
Exploit
Send unauthorized request to privileged functionality
Execution
Bypass authentication mechanism
Impact
Execute arbitrary code as SYSTEM
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Vulnerability AssessmentAI

Exploitation GFI Archiver with MArc.Store.Remoting.exe service listening on port 8018 with default configuration. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 9.8. Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Second bypass vector for email archive access.
Remediation Apply patch. Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Inventory all GFI Archiver deployments and isolate affected systems from untrusted networks; notify your incident response team and legal/compliance. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-2039 vulnerability details – vuln.today
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