CVE-2020-37200 in Nsauditor NetShareWatcher
Summary
by MITRE • 02/11/2026
NetShareWatcher 1.5.8.0 contains a buffer overflow vulnerability in the registration key input that allows attackers to crash the application by supplying oversized input. Attackers can generate a 1000-character payload and paste it into the registration key field to trigger an application crash.
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Analysis
by VulDB Data Team • 06/29/2026
The vulnerability identified as CVE-2020-37200 represents a critical buffer overflow flaw within NetShareWatcher version 1.5.8.0 that stems from inadequate input validation in the registration key processing mechanism. This weakness falls under the common weakness enumeration CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The flaw manifests when the application processes registration key inputs without proper size limitations, creating an exploitable condition that can be leveraged by malicious actors to disrupt service availability.
The technical implementation of this vulnerability occurs through the application's handling of user-supplied registration key data, where the software fails to validate the maximum length of input characters before attempting to process the data. When an attacker supplies a 1000-character payload through the registration key field, the application's internal buffer cannot accommodate such an oversized input, leading to memory corruption and subsequent application crash. This behavior aligns with the ATT&CK technique T1499.004 for network denial of service, where adversaries exploit software vulnerabilities to cause system instability and application termination.
The operational impact of this vulnerability extends beyond simple application crashes, as it represents a potential vector for more sophisticated attacks within the broader context of software exploitation. While the immediate effect appears to be a denial of service condition, the underlying buffer overflow condition creates opportunities for attackers to potentially escalate privileges or execute arbitrary code, particularly if the application operates with elevated permissions. The vulnerability demonstrates poor defensive programming practices and highlights the importance of implementing proper input sanitization and bounds checking mechanisms. Security professionals should note that this flaw affects the application's integrity and availability, making it a significant concern for organizations relying on NetShareWatcher for network share monitoring.
Mitigation strategies for CVE-2020-37200 should prioritize immediate patching of the affected NetShareWatcher version to address the buffer overflow condition through proper input validation and length restriction mechanisms. Organizations should implement network segmentation and access controls to limit exposure to the vulnerable application, while also monitoring for suspicious registration key inputs that might indicate exploitation attempts. The implementation of input validation controls and proper bounds checking should be enforced across all user input fields to prevent similar vulnerabilities from occurring in other application components. Additionally, regular security assessments and code reviews should be conducted to identify and remediate potential buffer overflow conditions within the application's codebase, following established security development lifecycle practices and industry standards for secure coding.