Unrated severityNVD Advisory· Published Feb 19, 2026· Updated Mar 2, 2026

GFI MailEssentials AI < 22.4 ListServer.IsPathExist() Absolute Directory Traversal to File Enumeration

CVE-2026-23621

Description

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.

Affected products

Gfi/Mailessentialsllm-fuzzy
Range: <22.4
GFI Software/MailEssentials AIv5
Range: 0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releasesmitrerelease-notespatch
www.vulncheck.com/advisories/gfi-mailessentials-ai-listserver-ispathexist-absolute-directory-traversal-to-file-enumerationmitrethird-party-advisory

News mentions

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