CVE-2026-81479 in OpenManage Server Administrator Managed Node
Summary
by MITRE • 09/17/2026
Dell OpenManage Server Administrator, versions prior to 11.1.0.3, contains a Partial String Comparison vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Denial of service.
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Analysis
by VulDB Data Team • 09/17/2026
The identified security flaw resides within Dell OpenManage Server Administrator software for versions preceding the release of version 11.1.0.3. This specific component is a critical management utility used by system administrators to monitor and configure hardware components on Dell servers, including sensors, fans, power supplies, and storage controllers. The vulnerability stems from an implementation error in how the application handles string comparisons during authentication or authorization processes. Specifically, the flaw involves a partial string comparison mechanism that fails to strictly validate input against expected patterns before processing them within sensitive security contexts. This type of logic error is particularly dangerous because it allows attackers to bypass intended access controls by providing inputs that match only a prefix or substring of valid credentials or tokens rather than requiring an exact full-string match.
From a technical perspective, this vulnerability aligns with CWE-287 Improper Authentication and CWE-697 Incorrect Comparison, which describe scenarios where software fails to correctly verify the identity of users or systems due to flawed logic in comparison operations. When the application performs a partial string check instead of an exact match, it inadvertently accepts inputs that are technically incorrect but structurally similar enough to pass validation checks. For instance, if the system expects a specific administrative token starting with a certain sequence, providing any input beginning with that same sequence might be erroneously accepted as valid by the flawed comparison routine. This breaks the fundamental assumption of integrity and authenticity required for secure local access controls within the management interface.
The operational impact of this vulnerability is significant despite being classified under low-privilege exploitation scenarios. An attacker who has already gained local access to the server, even with minimal user privileges such as a standard guest account or unprivileged service account, can leverage this flaw to escalate their position or disrupt critical services. The primary consequence highlighted in reports is Denial of Service. By exploiting the partial string comparison logic, an attacker can trigger unexpected behavior within the OpenManage Server Administrator process. This could involve causing infinite loops, memory corruption, or resource exhaustion during the validation phase, leading to the crash or unresponsiveness of the management agent. Since this software is essential for hardware monitoring and remote management capabilities, its failure leaves the server without proper oversight, potentially masking other security incidents or preventing administrators from performing necessary maintenance tasks remotely.
Furthermore, while Denial of Service is the immediate effect, such authentication bypasses often serve as a precursor to more severe attacks in broader threat landscapes. Although local access is required initially, compromising the management interface can provide an attacker with deeper insights into hardware health, firmware versions, and network configurations, which aids in lateral movement within enterprise networks. This aligns with ATT&CK technique T1078 Valid Accounts, where attackers use legitimate credentials or bypass authentication to maintain persistence and gain higher-level access. The lack of strict input validation also reflects weaknesses often associated with CWE-20 Improper Input Validation, indicating that the software does not sufficiently sanitize or verify data before processing it in security-critical functions.
To mitigate this risk, organizations running Dell OpenManage Server Administrator must prioritize immediate patching to version 11.1.0.3 or later, where these comparison logic errors have been corrected by implementing strict equality checks and enhanced input validation routines. In environments where updating is not immediately feasible, administrators should enforce strict network segmentation to limit local access to the management interface only from trusted administrative workstations. Additionally, deploying host-based intrusion detection systems can help monitor for anomalous behavior associated with exploitation attempts against this specific service component. Regular audits of user privileges and adherence to the principle of least privilege are essential to minimize the attack surface available to potential low-privileged attackers who might attempt to exploit such logic flaws in critical infrastructure management tools.