CVE-2026-2036

GFI Archiver MArc.Store 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.Store.Remoting.exe process. 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-27936.

• CWE-502

• https://www.zerodayinitiative.com/advisories/ZDI-26-076/Third Party Advisory

Published

Feb 20, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-20345A vulnerability in the GPT file format parser of ClamAV coul…7.5
• CVE-2026-20346A vulnerability in the PDF file format parser of ClamAV coul…7.5
• CVE-2026-20347A vulnerability in the Mach-O file format parser of ClamAV c…7.5
• CVE-2026-20348A vulnerability in the XAR file format parser of ClamAV coul…7.5
• CVE-2026-20349A vulnerability in the Remote Access SSL VPN service for Cis…8.6
• CVE-2026-2035Deciso OPNsense diag_backup.php filename Command Injection R…6.8
• CVE-2026-2037GFI Archiver MArc.Core Deserialization of Untrusted Data Rem…8.8
• CVE-2026-2038GFI Archiver MArc.Core Missing Authorization Authentication …9.8
• CVE-2026-2039GFI Archiver MArc.Store Missing Authorization Authentication…9.8
• CVE-2026-2040PDF-XChange Editor TrackerUpdate Uncontrolled Search Path El…7.3
• CVE-2026-20401In Modem, there is a possible system crash due to an uncaugh…7.5
• CVE-2026-20402In Modem, there is a possible system crash due to improper i…6.5