CVE-2026-2039 GFI Archiver MArc.Store Missing Authorization Authentication Bypass Vulnerability

High 7.3 Published 20 Feb 2026 Updated 24 Feb 2026

Remote attackers can bypass authentication on GFI Archiver's MArc.Store service, potentially leading to code execution as SYSTEM.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-2039?

CVE-2026-2039 is a high-severity missing authorization vulnerability in GFI Archiver, published on 20 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-862

Which versions are affected by CVE-2026-2039?

It affects 1 product.

Products include Gfi Archiver.

How do I fix CVE-2026-2039?

No fix has been published for CVE-2026-2039 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-2039 being exploited?

There is no known exploitation of CVE-2026-2039 in the wild and no public exploit code.

Sources

Also known as GHSA-q8fp-vccx-9w2h.