How severe is CVE-2026-2039?

CVE-2026-2039 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-2039 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2039?

CVE-2026-2039 affects Gfi Archiver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2039?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-2039 have an EU (EUVD) identifier?

Yes. CVE-2026-2039 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7773.

When was CVE-2026-2039 published?

CVE-2026-2039 was published on 2026-02-20 and last updated on 2026-06-17.

CVE-2026-2039

CVE-2026-2039 is a critical-severity vulnerability in Gfi Archiver with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7773
Weakness: CWE-862
Affected product: Gfi Archiver
Published: 2026-02-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-2039?: CVE-2026-2039 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-2039 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2039?: CVE-2026-2039 affects Gfi Archiver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2039?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-2039 have an EU (EUVD) identifier?: Yes. CVE-2026-2039 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7773.
When was CVE-2026-2039 published?: CVE-2026-2039 was published on 2026-02-20 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-26-077/

Affected products (1)

cpe:2.3:a:gfi:archiver:15.10:*:*:*:*:*:*:*

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