CVE-2018-10253 in PRTG Network Monitor
Summary
by MITRE
Paessler PRTG Network Monitor before 18.1.39.1648 mishandles stack memory during unspecified API calls.
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Analysis
by VulDB Data Team • 11/16/2025
The vulnerability identified as CVE-2018-10253 affects Paessler PRTG Network Monitor versions prior to 18.1.39.1648, representing a critical memory corruption issue within the application's API handling mechanisms. This flaw manifests during unspecified API calls where the software fails to properly manage stack memory allocation and deallocation processes. The improper memory handling creates opportunities for attackers to manipulate the application's execution flow through carefully crafted API requests that can lead to arbitrary code execution or system compromise.
The technical nature of this vulnerability stems from inadequate stack memory management during API processing, which falls under the broader category of memory safety issues commonly classified as CWE-121 Stack-based Buffer Overflow. When the application processes API calls, it fails to validate input parameters or properly handle memory boundaries, allowing malicious actors to overwrite adjacent stack memory locations. This type of vulnerability is particularly dangerous because it can be exploited to execute arbitrary code with the privileges of the affected application process, potentially leading to full system compromise. The vulnerability's exploitation requires careful crafting of API requests that trigger the memory corruption behavior during stack operations.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it provides attackers with a pathway to achieve persistent system access. Network monitoring tools like PRTG are often deployed with elevated privileges to perform comprehensive network monitoring and data collection, making them attractive targets for attackers seeking to establish persistent access to network infrastructure. When exploited, this vulnerability can allow remote code execution that enables attackers to install backdoors, exfiltrate sensitive monitoring data, or use the compromised system as a launch point for further network attacks. The attack surface is particularly concerning given that PRTG is widely used in enterprise environments for critical network monitoring operations.
Organizations should prioritize immediate remediation by upgrading to Paessler PRTG Network Monitor version 18.1.39.1648 or later, which contains the necessary patches to address the memory handling issues. System administrators should also implement network segmentation and access controls to limit exposure of monitoring systems to untrusted networks. Additional mitigations include monitoring API call patterns for suspicious activity and implementing intrusion detection systems that can identify potential exploitation attempts. The vulnerability demonstrates the importance of proper input validation and memory management practices in network monitoring applications, aligning with ATT&CK technique T1059.001 for Command and Scripting Interpreter and T1078.004 for Valid Accounts to establish persistence. Organizations should also consider implementing application whitelisting policies and regular security assessments to identify similar memory corruption vulnerabilities in other network monitoring tools and enterprise applications.