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CVE-2025-43936 – Authentication Bypass (Unauthorized Access) – Dell ObjectScale before 4.4.0.0

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Summary

CVE-2025-43936 is an Improper Authentication vulnerability (CWE-287) affecting Dell ObjectScale, an enterprise object storage platform. The flaw allows an unauthenticated remote attacker to gain unauthorized access to the system, and it is rated High severity with a CVSS v3.1 base score of 8.1. Dell disclosed the issue as part of security advisory DSA-2026-393, which covers multiple vulnerabilities in ObjectScale, including a separate critical (CVSS 10.0) remote code execution flaw.

Technical details

  • Root cause: An authentication mechanism within Dell ObjectScale fails to properly validate/enforce identity checks (CWE-287, Improper Authentication).
  • Trigger conditions: No authentication credentials or user interaction are required to attempt exploitation; the attack complexity is rated High, meaning exploitation likely requires specific conditions or non-trivial preparation by the attacker.
  • Attack vector: Network — the vulnerable component is reachable remotely, meaning exposed ObjectScale management or service interfaces could be targeted directly over the network.
  • Impact: Successful exploitation results in unauthorized access to the affected system, with the CVSS vector indicating High impact to confidentiality, integrity, and availability once access is obtained.

Affected software

  • Dell ObjectScale versions prior to 4.4.0.0
  • Dell ECS versions 3.x through 3.8.1.7 (ECS shares the affected component with ObjectScale per Dell’s advisory)

Severity

  • CVSS v3.1 Base Score: 8.1 (High)
  • Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade affected Dell ObjectScale deployments to version 4.4.0.0 or later, where the issue is resolved. Customers should open an "Operating Environment Upgrade" Service Request with Dell and reference advisory DSA-2026-393 to obtain the update.
  • If immediate patching is not possible: Follow the "Secure Service-Level Communication" guidance in the official Dell ObjectScale Security Configuration Guide to reduce exposure until the upgrade can be applied. Additionally, restrict network access to ObjectScale management and service interfaces to trusted internal networks only, minimizing exposure to unauthenticated remote attackers.

References

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