CVE-2026-91908 in OpenManage Enterprise
Summary
by MITRE • 11/02/2026
Dell OpenManage Enterprise, versions prior to 4.8.0, contains an Improper Verification of Cryptographic Signature vulnerability. A high privileged attacker with adjacent network access could potentially exploit this vulnerability, leading to Code execution.
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Analysis
by VulDB Data Team • 11/02/2026
The vulnerability identified in Dell OpenManage Enterprise versions prior to 4.8.0 represents a critical failure in the application's integrity verification mechanisms, specifically categorized under CWE-347: Improper Verification of Cryptographic Signature. This flaw resides within the core authentication and update validation subsystems that are responsible for ensuring that software components, configuration files, or management payloads originate from trusted sources and have not been tampered with during transit or storage. In a properly secured system, cryptographic signatures serve as the primary defense against supply chain attacks and man-in-the-middle modifications, guaranteeing both authenticity and integrity of the data being processed by the enterprise management platform.
The technical nature of this flaw involves insufficient checks performed on digital signatures before they are accepted for execution or deployment. When an attacker with high privileged access and adjacent network connectivity interacts with the vulnerable system components, they can bypass these verification steps. This allows maliciously crafted code or configuration data to be processed as if it were legitimate software from Dell. The absence of rigorous signature validation means that the application fails to distinguish between authentic updates provided by the vendor and modified payloads injected into the communication stream or stored within the local environment.
From an operational perspective, this vulnerability poses a severe risk to the confidentiality, integrity, and availability of the managed infrastructure. Because the attacker already possesses high privileges, they are positioned to leverage this flaw for lateral movement and privilege escalation within the management plane. The successful exploitation leads directly to arbitrary code execution on the Dell OpenManage Enterprise server itself. This grants the adversary full control over the central hub that manages hundreds or thousands of physical servers, storage arrays, and network devices. Consequently, an attacker can deploy malware, exfiltrate sensitive inventory data, modify firmware settings across the entire fleet, or disrupt critical business operations by taking down essential management services.
This vulnerability aligns with several tactics within the MITRE ATT&CK framework, particularly those related to Defense Evasion such as Masquerading (T1036) and Indicator Removal on Host (T1070), where attackers use legitimate-looking signatures to hide malicious activity. It also relates to Command and Control techniques if used for establishing persistent backdoors through the management interface. The adjacent network access requirement implies that an attacker must be within the same broadcast domain or subnet, suggesting potential mitigation strategies should focus on strict network segmentation. Isolating the Dell OpenManage Enterprise servers in a dedicated, restricted VLAN with minimal ingress and egress rules is essential to limit exposure.
To mitigate this risk, organizations running versions prior to 4.8.0 must apply the vendor-provided patch immediately upon availability. Until the update is applied, administrators should enforce strict access controls using multi-factor authentication for all administrative accounts and review network firewall policies to ensure that only authorized management stations can communicate with the OpenManage Enterprise interface. Additionally, implementing network intrusion detection systems capable of identifying anomalous traffic patterns associated with signature bypass attempts can provide an additional layer of defense against exploitation while patching efforts are underway.