CVE-2026-81455

8.6

Dell · ThinOS 10

Dell ThinOS 10 contains a missing authentication vulnerability that allows unauthenticated remote attackers to gain unauthorized access to critical system functions.

Executive summary

A critical authentication bypass in Dell ThinOS 10 exposes devices to unauthorized remote access, necessitating immediate security updates.

Vulnerability

This flaw involves a missing authentication for a critical function (CWE-306). An unauthenticated remote attacker can interact with sensitive system components without providing valid credentials, resulting in unauthorized access.

Business impact

The vulnerability carries a CVSS score of 8.6, placing it in the High severity range. Successful exploitation allows unauthorized entities to bypass security controls, which could lead to sensitive data exposure, configuration tampering, or the potential for further lateral movement within the network. The impact is significant as it affects the core security posture of the affected thin client infrastructure.

Remediation

Immediate Action: Update Dell ThinOS 10 to version SecurityAddon_2605.10.2766_T10 or later as specified in the vendor security advisory.

Proactive Monitoring: Review system access logs for unusual administrative activity or unauthorized attempts to reach management endpoints from external network segments.

Compensating Controls: Ensure that thin client management interfaces are not exposed to the public internet and are restricted to trusted internal management VLANs.

Exploitation status

Public Exploit Available: No (exploit_available: false)

Analyst recommendation

Given the high CVSS score and the potential for unauthorized access, administrators should prioritize the deployment of the SecurityAddon_2605.10.2766_T10 update across all affected Dell ThinOS 10 devices. Failure to patch leaves systems vulnerable to remote compromise, and immediate action is required to maintain the integrity of the endpoint environment.

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History

  1. Disclosed CVE record published
  2. Collected by CVE Brief via github
  3. Analyst report written
  4. Published in the daily brief high section

Sources