CVE-2026-2037 GFI Archiver MArc.Core Deserialization of Untrusted Data Remote Code Execution Vulnerability

High 8.8 Published 20 Feb 2026 Updated 24 Feb 2026

Remote attackers can execute arbitrary code as SYSTEM via deserialization in GFI Archiver, bypassing authentication.

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

What is CVE-2026-2037?

CVE-2026-2037 is a high-severity unsafe deserialization vulnerability in GFI Archiver, published on 20 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

GFI Archiver MArc.Core Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GFI Archiver. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

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 proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-27935.

Weakness: CWE-502

Which versions are affected by CVE-2026-2037?

It affects 1 product.

Products include Gfi Archiver.

How do I fix CVE-2026-2037?

No fix has been published for CVE-2026-2037 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2026-2037 being exploited?

There is no known exploitation of CVE-2026-2037 in the wild and no public exploit code.

Sources

Also known as GHSA-7h2v-5mq4-f627.