How severe is CVE-2026-5055?

CVE-2026-5055 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-5055 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5055?

CVE-2026-5055 affects Nomachine. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5055?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-5055 have an EU (EUVD) identifier?

Yes. CVE-2026-5055 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21654.

When was CVE-2026-5055 published?

CVE-2026-5055 was published on 2026-04-11 and last updated on 2026-06-17.

CVE-2026-5055

CVE-2026-5055 is a high-severity vulnerability in Nomachine with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-427.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21654
Weakness: CWE-427
Affected product: Nomachine
Published: 2026-04-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-5055?: 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.
How severe is CVE-2026-5055?: CVE-2026-5055 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-5055 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5055?: CVE-2026-5055 affects Nomachine. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5055?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-5055 have an EU (EUVD) identifier?: Yes. CVE-2026-5055 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21654.
When was CVE-2026-5055 published?: CVE-2026-5055 was published on 2026-04-11 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-26-249/

Affected products (1)

cpe:2.3:a:nomachine:nomachine:*:*:*:*:*:*:*:*

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