High · CVSS 8.8CVE-2026-92208

NoMachine mDNS Heap-based Buffer Overflow Remote Code Execution VulnerabilityCVE-2026-92208

Answer in brief

CVE-2026-92208 records a High severity (CVSS 8.8) vulnerability in NoMachine mDNS Heap-based Buffer Overflow Remote Code Execution Vulnerability. The current sources do not mark it as known exploited. The current feed maps NoMachine/NoMachine (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 21, 2026Updated Oct 23, 2026Source checked Oct 25, 2026First seen by HOL Oct 21, 2026Material review Oct 23, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.8
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps NoMachine/NoMachine (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
NoMachine/NoMachinegeneric	9.8.2_1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for NoMachine/NoMachine.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 21, 2026

Sources and claim methodology

Source referencezerodayinitiative.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.