CVE-2026-92208: NoMachine mDNS heap-based buffer overflow remote code execution

CVE-2026-92208 · Severity: high · CVSS 8.8 · Published 2026-10-21

NoMachine is remote desktop and application access software used to connect to computers over networks. A heap buffer overflow in its mDNS (multicast DNS) parser allows attackers on the local network to execute arbitrary code without authentication, potentially gaining full control of the affected system.

Technologies: Nomachine. Vendors: Nomachine.

Quick answers

Is CVE-2026-92208 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-92208 being exploited in the wild.
How severe is CVE-2026-92208?
High severity, with a CVSS score of 8.8, published 21 October 2026.
Which products and versions are affected?
Nomachine before 10.1.7, 9.9.6, and 8.27.1.
Is there a fix for CVE-2026-92208?
Yes: fixed in NoMachine v10.1.7, v9.9.6, v8.27.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-92208 attacked?
It is attacked from the adjacent network, in a hosted service.
Am I affected by CVE-2026-92208?
Check whether you run Nomachine at an affected version. 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.

How to fix

  • Fixed in: NoMachine v10.1.7, v9.9.6, v8.27.1

Technical details

The vulnerability exists in the parsing of mDNS resource records where insufficient validation of user-supplied data length results in a heap-based buffer overflow. Attackers on the network-adjacent segment can trigger this by sending specially crafted mDNS packets; no authentication or user interaction is required. Successful exploitation grants arbitrary code execution in the context of the service account.

Affected products

  • NoMachine NoMachine before 10.1.7, 9.9.6, and 8.27.1

Timeline

  • 2026-08-07: disclosed: Vulnerability reported to vendor
  • 2026-09-16: advisory: Coordinated public release of advisory

References

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