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Mailessentials CVE-2026-23620

MEDIUM
Observable Discrepancy (CWE-203)
2026-02-19 disclosure@vulncheck.com
RCE Mailessentials
4.3
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:03 vuln.today
CVE Published
Feb 19, 2026 - 18:24 nvd
MEDIUM 4.3

DescriptionCVE.org

GFI MailEssentials AI versions prior to 22.4 contain an arbitrary file existence enumeration vulnerability in the ListServer.IsDBExist() web method exposed at /MailEssentials/pages/MailSecurity/ListServer.aspx/IsDBExist. An authenticated user can supply an unrestricted filesystem path via the JSON key \"path\", which is URL-decoded and passed to File.Exists(), allowing the attacker to determine whether arbitrary files exist on the server.

AnalysisAI

GFI MailEssentials AI versions before 22.4 expose a file enumeration vulnerability in the ListServer.IsDBExist() web method that allows authenticated users to probe arbitrary filesystem paths and determine file existence on the server. An attacker can exploit this by submitting unrestricted paths via the JSON "path" parameter, which are processed without validation, disclosing sensitive information about the server's filesystem structure. …

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Vulnerability AssessmentAI

Risk Assessment CVSS 4.3 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
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CVE-2026-23620 vulnerability details – vuln.today
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