Is CVE-2026-23621 actively exploited?

No active exploitation of CVE-2026-23621 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-23621 be exploited remotely?

Yes. CVE-2026-23621 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-23621?

CVE-2026-23621 has a CVSS score of 4.3 (MEDIUM) and an EPSS exploitation probability of 0.03%.

HOME VULNERABILITIESCVE-2026-23621

MEDIUM

CVE-2026-23621

CWE-203Published: February 19, 2026· Updated: Feb 20, 2026

4.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:7.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-23621 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.