Vulnerability · Published Oct 21, 2026 · Assigned by zdi
CVE-2026-92208NoMachine mDNS Heap-based Buffer Overflow Remote Code Execution Vulnerability
High 8.8
In plain English
A high-severity heap buffer overflow in NoMachine from NoMachine. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
NoMachine mDNS Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NoMachine. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of mDNS resource records. 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-30982.
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- ZDI-26-710 x_research-advisory