CVE Catalog

CVE-2026-114549

CriticalCVSS 9.8
Published: Translated: NVD NIST

Summary

The NoMachine nxwebrunner web service (listening on TCP port 4443 by default) contains a heap-based buffer overflow due to lack of validation of user-supplied data length. An unauthenticated remote attacker can execute arbitrary code in the context of the service account.

Risk Assessment

The vulnerability enables unauthenticated remote code execution, potentially leading to system compromise. High risk for organizations exposing the NoMachine service.

Recommendation

Update NoMachine to a patched version. Restrict access to port 4443 and monitor for suspicious network traffic.

Other vulnerabilities in NoMachine

See all
Original NVD description (English source)

NoMachine nxwebrunner Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of NoMachine. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 4443 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-30685.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS