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CVE-2026-114549— NoMachine nxwebrunner Heap-based Buffer Overflow Remote Code Execution Vulnerability

Quick assessment

Affected
NoMachine NoMachine
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NoMachine nxwebrunner 存在基于堆的缓冲区溢出漏洞，可导致远程代码执行。该漏洞允许远程攻击者在受影响的 NoMachine 安装中执行任意代码，且利用此漏洞无需进行身份认证。 该具体缺陷存在于 Web 服务中，该服务默认监听 TCP 端口 4443。问题源于在将用户提供的数据复制到基于堆的缓冲区之前，未对数据长度进行适当的验证。攻击者可利用此漏洞，在服务账户的上下文中执行代码。此漏洞编号为 ZDI-CAN-30685。

AI Predicted 9.8 Difficulty: Moderate
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I. Basic Information for CVE-2026-114549

Vulnerability Information
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Vulnerability Title
NoMachine nxwebrunner Heap-based Buffer Overflow Remote Code Execution Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
NoMachine nxwebrunner Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of NoMachine. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 4443 by default. 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-30685.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
NoMachine NoMachine 9.7.3 -

II. Public POCs for CVE-2026-114549

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III. Intelligence Information for CVE-2026-114549

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Other References for CVE-2026-114549 (1)

IV. Related Vulnerabilities

Same product: NoMachine
Same vendor: NoMachine
Same weakness: CWE-122