CVE-2026-81441 Overview
CVE-2026-81441 affects Dell OpenManage Server Administrator (OMSA) versions prior to 11.1.0.3. The vulnerability is a Missing Authentication for Critical Function weakness classified under [CWE-306]. An unauthenticated attacker with local access can trigger the affected function and cause a denial of service condition on the host running OMSA.
The issue does not affect confidentiality or integrity. Impact is limited to availability of the OMSA service. Dell published the fix in the Dell Security Update Advisory.
Critical Impact
An unauthenticated local attacker can disrupt Dell OpenManage Server Administrator, degrading server management and monitoring capabilities on affected hosts.
Affected Products
- Dell OpenManage Server Administrator (OMSA) versions prior to 11.1.0.3
- Servers using OMSA for out-of-band hardware management and monitoring
- Deployments that have not applied the DSA-2026-403 update
Discovery Timeline
- 2026-09-17 - CVE-2026-81441 published to the National Vulnerability Database (NVD)
- 2026-09-17 - Last updated in NVD database
Technical Details for CVE-2026-81441
Vulnerability Analysis
Dell OpenManage Server Administrator exposes management functions used to monitor and configure server hardware. The vulnerable build fails to enforce authentication on a critical function reachable from the local host. An attacker with local access can invoke this function without providing credentials.
Exploitation leads to a denial of service against the OMSA service. Because attack complexity is low and no privileges or user interaction are required, any local user context on an unpatched system can trigger the condition. The scope remains unchanged, and confidentiality and integrity are not affected.
Administrators relying on OMSA for out-of-band hardware telemetry lose visibility while the service is disrupted. This can delay identification of hardware faults, thermal events, and RAID status changes on production servers.
Root Cause
The root cause is Missing Authentication for Critical Function [CWE-306]. OMSA versions prior to 11.1.0.3 expose a management function that does not verify caller identity before executing. The function should require authenticated access, but the affected releases omit that check.
Attack Vector
The attack vector is local. An attacker must have some form of access on the host where OMSA is installed. From that position, the attacker calls the unauthenticated function and triggers a denial of service against the OMSA service. No network exposure or user interaction is required.
The vulnerability does not permit code execution or data exfiltration. See the Dell Security Update Advisory for vendor technical details.
Detection Methods for CVE-2026-81441
Indicators of Compromise
- Unexpected termination or repeated restarts of the OMSA service (dsm_om_connsvc, dsm_sa_datamgrd) on affected hosts.
- Gaps in hardware telemetry, sensor data, or RAID status reporting from OMSA-managed servers.
- Local process activity from non-administrative accounts interacting with OMSA management endpoints or IPC channels.
Detection Strategies
- Inventory OMSA installations and flag any version below 11.1.0.3 for prioritized patching.
- Correlate OMSA service crashes with local logon sessions and process creation events to identify triggering activity.
- Monitor Dell EEMI event logs and system logs for abnormal OMSA subsystem termination patterns.
Monitoring Recommendations
- Alert on repeated OMSA service failures within short time windows on servers running vulnerable builds.
- Track local user access to OMSA hosts and review sessions coinciding with service disruption.
- Include OMSA host availability in monitoring dashboards so denial of service conditions surface immediately.
How to Mitigate CVE-2026-81441
Immediate Actions Required
- Upgrade Dell OpenManage Server Administrator to version 11.1.0.3 or later on all managed servers.
- Restrict local access to OMSA hosts to authorized administrators until the patch is applied.
- Review local account inventories and remove unnecessary interactive logon rights on servers running OMSA.
Patch Information
Dell released a fixed build in OMSA 11.1.0.3 as part of DSA-2026-403. Download the updated package and remediation guidance from the Dell Security Update Advisory. Apply the update following Dell's standard OMSA upgrade procedure and validate the service returns to a healthy state after installation.
Workarounds
- Where patching is delayed, limit interactive and remote local access to OMSA hosts to a minimal administrator group.
- Stop and disable the OMSA service on systems where hardware management is not actively required until the update is applied.
- Apply host-based access controls to restrict which local accounts can interact with OMSA IPC endpoints.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
