# CVE-2026-5055: NoMachine privilege escalation in Device Server

Source: https://junglewise.ai/threats/cve-2026-5055-nomachine-privilege-escalation-in-device-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-11. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2026-5055 · Severity: high · CVSS 7.8 · Published 2026-04-11

NoMachine is a remote desktop and connectivity tool used to access computers over a network. A security flaw in the NoMachine Device Server allows a user who already has limited access to a computer to gain full administrative (SYSTEM) control. This could allow an attacker to bypass security restrictions, access sensitive data, or install malicious software on the affected machine.

Technologies: [Nomachine](https://junglewise.ai/threats/technologies/nomachine). Vendors: [Nomachine](https://junglewise.ai/threats/vendors/nomachine).

## Quick answers

**Is CVE-2026-5055 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-5055 being exploited in the wild.

**How severe is CVE-2026-5055?** High severity, with a CVSS score of 7.8, published 11 April 2026.

**Which products and versions are affected?** NoMachine NoMachine versions prior to 9.4.14.

**Is there a fix for CVE-2026-5055?** A patch was published on 2026-03-30: Fixed in NoMachine version 9.4.14 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-5055 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-5055?** Check whether you run Nomachine. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A local privilege escalation vulnerability exists in the NoMachine Device Server due to an uncontrolled search path element (CWE-427). The application attempts to load a library from an unsecured location, which can be manipulated by a local user. An attacker with low-privileged code execution capabilities on the target system can place a malicious DLL or library in the expected path. When the service loads the library, it executes the attacker's code with SYSTEM-level privileges. This vulnerability is addressed in NoMachine version 9.4.14.

## Affected products

- NoMachine NoMachine versions prior to 9.4.14

## Timeline

- 2025-12-24: other: Vulnerability reported to vendor
- 2026-03-30: patched: Fixed in NoMachine version 9.4.14
- 2026-03-30: advisory: Coordinated public release by ZDI
- 2026-04-11: disclosed: NVD publication date

## References

- [https://www.zerodayinitiative.com/advisories/ZDI-26-249/](https://www.zerodayinitiative.com/advisories/ZDI-26-249/)

## Related threats

- [NoMachine nxhtd server-side request forgery information disclosure](https://junglewise.ai/threats/cve-2026-92210-nomachine-nxhtd-server-side-request-forgery-information)
- [NoMachine Redis improper authentication privilege escalation](https://junglewise.ai/threats/cve-2026-92209-nomachine-redis-improper-authentication-local-privilege)
- [NoMachine mDNS heap-based buffer overflow remote code execution](https://junglewise.ai/threats/cve-2026-92208-nomachine-mdns-heap-based-buffer-overflow-remote-code-execution)
- [NoMachine Device Service named pipe privilege escalation](https://junglewise.ai/threats/cve-2026-111184-nomachine-named-pipe-incorrect-permission-assignment-local)
- [NoMachine privilege escalation via argument injection in nxchmod.sh](https://junglewise.ai/threats/cve-2026-53694-nomachine-privilege-escalation-via-argument-injection-in-nxchmod)