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Archiver CVE-2026-2038

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.Core 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.Core.Remoting.exe process, which listens on port 8017. 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-27934.

AnalysisAI

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

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Connect to MArc.Core.Remoting.exe port 8017
Exploit
Bypass authentication checks via missing authorization
Execution
Access privileged functionality
Impact
Execute arbitrary code as SYSTEM
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Vulnerability AssessmentAI

Exploitation GFI Archiver with MArc.Core.Remoting.exe service listening on port 8017 with default network exposure. … 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 Bypass auth to access archived emails.
Remediation Apply patch. Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all GFI Archiver instances in your environment and isolate them from untrusted networks if possible; enable enhanced logging and monitoring for suspicious access attempts. …

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CVE-2026-2038 vulnerability details – vuln.today
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