CVE-2026-81447 in OpenManage Server Administrator
Summary
by MITRE • 09/17/2026
Dell OpenManage Server Administrator, versions prior to 11.1.0.3, contains an Improper Certificate Validation vulnerability. An unauthenticated attacker with adjacent network access could potentially exploit this vulnerability, leading to Information disclosure and Information tampering.
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Analysis
by VulDB Data Team • 09/17/2026
The Dell OpenManage Server Administrator software serves as a critical management interface for enterprise IT infrastructure, allowing administrators to monitor hardware health, configure settings, and manage remote servers across data centers. Versions prior to 11.1.0.3 contain a significant security flaw classified under CWE-295, which denotes Improper Certificate Validation. This vulnerability arises from the application's failure to rigorously verify the authenticity and integrity of digital certificates presented during secure communication sessions, particularly within its web-based management interface or API endpoints. In modern networked environments, TLS certificate validation is a fundamental control mechanism designed to prevent man-in-the-middle attacks by ensuring that clients are communicating with legitimate servers and not malicious intermediaries who might be intercepting traffic.
The technical nature of this flaw involves the software's acceptance of certificates without sufficient checks against trusted certification authorities or proper hostname verification. This oversight allows an attacker positioned on the adjacent network segment to perform a man-in-the-middle attack by presenting a self-signed or improperly validated certificate during the initial handshake process. Because the client does not reject invalid credentials, it proceeds to establish an encrypted session under the false assumption that the connection is secure and authentic. This behavior directly maps to MITRE ATT&CK technique T1078, Valid Accounts, as well as network-centric interception tactics where trust boundaries are bypassed through cryptographic weaknesses rather than direct authentication breaches.
The operational impact of this vulnerability is severe due to its potential for both information disclosure and data tampering. An unauthenticated attacker with adjacent network access can intercept sensitive management traffic, including login credentials, hardware configuration details, system logs, and firmware update packages. The interception capability enables the exfiltration of confidential organizational data that could be leveraged for further social engineering or targeted attacks against specific server models. Furthermore, the ability to tamper with communications allows an attacker to modify commands sent to the management interface or alter responses received from it. This could result in unauthorized configuration changes, such as disabling security features, redirecting traffic, or deploying malicious firmware updates that compromise the underlying hardware integrity.
Mitigation strategies must prioritize immediate patching and network segmentation until updates are applied. Dell has released version 11.1.0.3 and subsequent releases to address this improper certificate validation issue by enforcing strict compliance with standard TLS verification procedures. Administrators should update all affected OpenManage Server Administrator instances to the latest stable release as soon as possible. In environments where immediate patching is not feasible, network segmentation controls such as firewalls or VLANs should be implemented to restrict access to the management interface exclusively from trusted administrative subnets. Additionally, enabling mutual TLS authentication and ensuring that client systems maintain up-to-date root certificate stores can provide an additional layer of defense against man-in-the-middle exploitation attempts involving invalid certificates.