RCE in Optimal-Systems Enaio
CVE-2025-56425
An issue was discovered in the AppConnector component version 10.10.0.183 and earlier of enaio 10.10, in the AppConnector component version 11.0.0.183 and earlier of enaio 11.0, and in the AppConnctor component version 11.10.0.183 and earlier of enaio 11.10. The vulnerability allows authenticated remote attackers to inject arbitrary SMTP commands via crafted input to the /osrest/api/organization/sendmail endpoint
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.001
Affected products
Weakness classification (CWE)
References
- www.optimal-systems.de/enaio (Product)
- mind-bytes.de/smtp-injection-in-enaio-component-appconnector-cve-2025-56425/ (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-56425?
- CVE-2025-56425 is a critical-severity vulnerability in Optimal-Systems Enaio, classified under Command Injection. CVSS score: 9.1/10. Published 2026-01-08.
- How severe is CVE-2025-56425?
- Critical severity. CVSS v3 base score is 9.1 out of 10.