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CVE-2023-43208

Critical 9.8 Exploited in the wild (KEV) Used in ransomware campaigns

Confirmed active exploitation — CISA KEV catalog

Name
NextGen Healthcare Mirth Connect Deserialization of Untrusted Data Vulnerability
Added to catalog
Remediation due date (US federal)
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Description

NextGen Healthcare Mirth Connect before version 4.4.1 is vulnerable to unauthenticated remote code execution. Note that this vulnerability is caused by the incomplete patch of CVE-2023-37679.

Metrics

CVSS 3.1
9.8 (CRITICAL) Score source: NVD CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — exploit probability
86% (percentile: 100) as of 2 November 2026
CWE
CWE-78, CWE-502

Affected products

nextgen: mirth connect

References