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THREAT OPSThreat News › Security advisory: Pre-authentication SYSTEM RCE in iMonnit Express 4.0.5.5 (Monnit / iMonnit)

Security advisory: Pre-authentication SYSTEM RCE in iMonnit Express 4.0.5.5 (Monnit / iMonnit)

medfulldisclosurePublished 2026-08-18

<p>Posted by disclosure via Fulldisclosure on Aug 17</p>0day Rubbish Research Team is publicly disclosing a vulnerability in iMonnit Express 4.0.5.5 (Monnit / iMonnit). The <br /> research is published and a proof-of-concept is available.<br /> <br /> Pre-authentication SYSTEM RCE (CVSS 9.8, pre-authentication)<br /> <br /> iMonnit Express 4.0.5.5 is an ASP.NET Core application running as a Window

MITRE ATT&CK techniques

Indicators of compromise

Original source: https://seclists.org/fulldisclosure/2026/Aug/54