Is CVE-2026-5055 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2026-5055, but active exploitation has not been confirmed.

Can CVE-2026-5055 be exploited remotely?

No. CVE-2026-5055 requires local access to exploit.

What is the CVSS score of CVE-2026-5055?

CVE-2026-5055 has a CVSS score of 7.8 (HIGH).

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HIGHPOC

CVE-2026-5055

CWE-427Published: April 11, 2026· Updated: Apr 15, 2026

7.8

CVSS v3.1

Official Description

NoMachine Uncontrolled Search Path Element Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of NoMachine. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the NoMachine Device Server. The product loads a library from an unsecured location. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-28494.

NVD Source

Technical Analysis

CVE-2026-5055 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

A proof-of-concept (PoC) exploit exists for CVE-2026-5055. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.