CVE-2026-23621

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

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases	Release Notes
https://www.vulncheck.com/advisories/gfi-mailessentials-ai-listserver-ispathexist-absolute-directory-traversal-to-file-enumeration	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:*

History

20 Feb 2026, 17:21

Type	Values Removed	Values Added
References	~~() https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases -~~	() https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases - Release Notes
References	~~() https://www.vulncheck.com/advisories/gfi-mailessentials-ai-listserver-ispathexist-absolute-directory-traversal-to-file-enumeration -~~	() https://www.vulncheck.com/advisories/gfi-mailessentials-ai-listserver-ispathexist-absolute-directory-traversal-to-file-enumeration - Third Party Advisory
First Time		Gfi Gfi mailessentials
CPE		cpe:2.3:a:gfi:mailessentials::::::::

19 Feb 2026, 20:25

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 4.3

19 Feb 2026, 19:22

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-19 19:22

Updated : 2026-02-20 17:21

NVD link : CVE-2026-23621

Mitre link : CVE-2026-23621

CVE.ORG link : CVE-2026-23621

JSON object : View

Products Affected

gfi

mailessentials

CWE

CWE-203

Observable Discrepancy

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