CVE-2026-81453 in OpenManage Server Administrator Managed Node
Summary
by MITRE • 09/17/2026
Dell OpenManage Server Administrator, versions prior to 11.1.0.3, contains an Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Filesystem access for attacker.
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Analysis
by VulDB Data Team • 09/17/2026
The Dell OpenManage Server Administrator (OMSA) is a comprehensive management suite designed to monitor and manage Dell servers by providing hardware health status, firmware updates, and configuration capabilities through both command-line interfaces and web-based graphical user interfaces. Versions prior to 11.1.0.3 contain a critical security flaw classified as an Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal or directory traversal. This vulnerability arises from insufficient validation of user-supplied input within the application's file handling mechanisms. Specifically, when processing requests that involve accessing files on the server system, the software fails to adequately sanitize paths containing special characters such as dot-dot-slash sequences (../). These sequences are standard in Unix-like operating systems and represent a reference to the parent directory, allowing an attacker to navigate outside of intended directories if not properly restricted.
From a technical perspective, this flaw allows for unauthorized filesystem access by bypassing security boundaries that should confine user interactions to specific application directories. An attacker who has obtained low-privileged remote access credentials can craft malicious HTTP requests or API calls containing encoded path traversal sequences. By manipulating these inputs, the attacker directs the server administrator software to read files located in sensitive areas of the operating system file hierarchy. This capability effectively neutralizes the principle of least privilege associated with the compromised account, as it grants the ability to traverse up from the web root into directories that typically store configuration data, logs, and potentially other application artifacts not intended for public or low-privilege access.
The operational impact of this vulnerability is significant because it serves as a powerful foothold in an enterprise environment. Once an attacker gains the ability to read arbitrary files on the server, they can extract sensitive information such as database connection strings, API keys, session tokens, and configuration files that may contain further credentials or network topology details. This access facilitates lateral movement within the network and aids in privilege escalation attacks. For instance, reading system password hashes or SSH private keys could allow an attacker to authenticate as a higher-privileged user or root, thereby gaining full control over the server infrastructure. The exploitation of this flaw aligns with common attack patterns observed in real-world scenarios where initial access is leveraged for data exfiltration and deeper network penetration.
In terms of industry standards, this vulnerability maps directly to CWE-22: Improper Limitation of a Pathname to a Restricted Directory within the Common Weakness Enumeration taxonomy. This classification highlights the failure to validate or sanitize user input before using it as part of a file path operation. Furthermore, from an offensive security perspective, particularly regarding the MITRE ATT&CK framework, this vulnerability supports techniques related to Collection and Credential Access. It enables adversaries to perform File and Directory Discovery (T1083) and potentially Steal Application Logs or Credentials from Files depending on what specific files are accessible through the traversal vector. The lack of proper input validation represents a fundamental design flaw that undermines the integrity of the management interface.
To mitigate this risk, organizations running Dell OpenManage Server Administrator versions prior to 11.1.0.3 must immediately apply the vendor-provided patch or upgrade to version 11.1.0.3 or later where these input validation checks have been strengthened. Until patches are applied, administrators should ensure that OMSA is not exposed directly to untrusted networks and restrict access via strict firewall rules allowing only trusted management IPs. Additionally, implementing Web Application Firewalls with specific rulesets capable of detecting path traversal patterns can provide a layer of defense in depth by blocking malicious requests before they reach the application logic. Regular auditing of file permissions and monitoring for unusual file read operations on managed servers are also recommended to detect potential exploitation attempts early.