CVE-2026-81477 in OpenManage Server Administrator
Summary
by MITRE • 09/17/2026
Dell OpenManage Server Administrator, versions prior to 11.1.0.3, contains a Heap-based Buffer Overflow vulnerability. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Code execution.
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Analysis
by VulDB Data Team • 09/17/2026
The Dell OpenManage Server Administrator (OMSA) is a comprehensive suite of management tools designed for monitoring and managing Dell PowerEdge servers. Versions prior to 11.1.0.3 contain a critical security flaw classified as a heap-based buffer overflow vulnerability within the application's core processing logic. This type of memory corruption error occurs when an input value exceeds the allocated size of a fixed-size buffer located in the dynamic memory segment, known as the heap. Unlike stack overflows which often target return addresses to hijack control flow immediately, heap overwrites can corrupt adjacent data structures such as function pointers or object headers within the same allocation block. This corruption allows for sophisticated exploitation techniques that can lead to arbitrary code execution on the affected system.
The technical nature of this vulnerability stems from insufficient boundary checks during the processing of specific input parameters sent to the OMSA service components. When a high-privileged attacker with remote access interacts with the vulnerable component, they can craft maliciously formatted requests containing oversized data payloads. Upon receiving these inputs, the application allocates memory on the heap but fails to verify that the incoming data fits within the pre-allocated space. Consequently, the excess data spills over into adjacent memory regions, corrupting critical metadata or executable code pointers stored in nearby allocations. This manipulation of internal program state enables an attacker to redirect execution flow toward shellcode injected as part of the overflow payload, thereby achieving remote code execution with the privileges associated with the OMSA service account.
From a risk perspective, this vulnerability poses a severe threat because it requires high-privileged access and remote connectivity for exploitation. While the requirement for elevated credentials might seem to limit the attack surface compared to unauthenticated vulnerabilities, in enterprise environments where server management accounts often possess broad administrative rights over operating system resources, successful exploitation results in complete compromise of the host machine. An attacker gaining code execution via this heap overflow can escalate privileges further if not already at maximum level, install persistent backdoors, exfiltrate sensitive data stored on the server, or use the compromised node as a pivot point to attack other systems within the network infrastructure. The impact is particularly acute in virtualized environments where one compromised host could potentially affect hypervisor stability and neighboring virtual machines depending on the specific deployment architecture.
This vulnerability aligns with Common Weakness Enumeration (CWE) identifier CWE-122, which describes heap-based buffer overflows as a category of memory corruption errors that allow attackers to execute arbitrary code by corrupting dynamic memory allocations. In terms of offensive security frameworks, this exploit scenario maps closely to MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter sub-techniques, where the initial access leads directly to execution capabilities without requiring additional user interaction beyond network connectivity. The lack of proper input validation represents a fundamental design flaw in how external data is handled by the management interface, highlighting the importance of rigorous memory safety practices in system administration software development.
To mitigate this risk, organizations running Dell OpenManage Server Administrator must immediately apply the vendor-recommended patch to upgrade to version 11.1.0.3 or later, which addresses the underlying buffer handling logic and enforces strict input length validation. Until patches are applied, administrators should restrict network access to the OMSA service ports using firewall rules, ensuring that only trusted management stations can communicate with the server components. Additionally, implementing principle of least privilege for the accounts used by the OMSA agent can limit the potential impact if an exploit is attempted, although this does not prevent exploitation itself. Regular vulnerability scanning and monitoring for anomalous process behavior originating from the OMSA service processes are also recommended to detect any attempts at memory corruption or unauthorized code execution in real-time.