What is the CVSS score of CVE-2026-23620?

CVE-2026-23620 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Mailessentials are affected by CVE-2026-23620?

CVE-2026-23620 presents moderate security risk rated CVSS 4.3. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-23620?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Mailessentials CVE-2026-23620

MEDIUM

Observable Discrepancy (CWE-203)

2026-02-19 disclosure@vulncheck.com

RCE Mailessentials

4.3

CVSS 3.1 · NVD

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

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. No patch is currently available for this vulnerability.

Technical ContextAI

Affects Mailessentials. 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.