Auth bypass in Gfi Archiver
CVE-2026-2039
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
- Gfi Archiver — versions 15.10
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-26-077/ (x_research-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-2039?
- CVE-2026-2039 is a critical-severity vulnerability in Gfi Archiver, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-02-20.
- How severe is CVE-2026-2039?
- Critical severity. CVSS v3 base score is 9.8 out of 10.