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CVE-2026-58574 – Missing Authentication Leading to Full Administrative Compromise – Dell PowerStore

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Summary

CVE-2026-58574 is a Critical Missing Authentication for Critical Function vulnerability (CWE-306) affecting Dell PowerStore T-series storage arrays. An unauthenticated attacker with network access to the restricted management interface can read internal system information directly from the appliance filesystem. Because this exposed data can include credentials granting full administrative access to the array, the flaw carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: The PowerStoreT OS management interface fails to enforce authentication on a critical function, allowing direct, unauthenticated access to internal filesystem data.
  • Trigger conditions: No credentials or user interaction are required — an attacker only needs network reachability to the restricted management interface of the appliance.
  • Attack vector: Network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Impact: Disclosure of internal system information and potentially stored credentials, which could then be leveraged to gain full administrative control of the PowerStore array — resulting in high impact to confidentiality, integrity, and availability.

Affected software

Dell PowerStore T models (500T, 1000T, 1200T, 3000T, 3200Q, 3200T, 5000T, 5200Q, 5200T, 7000T, 9000T, 9200T) running:

  • PowerStoreT OS 4.1.x: versions 4.1.0.0-2435323 through 4.1.0.5-2691357
  • PowerStoreT OS 4.3.x: versions 4.3.0.0-2611831 through 4.3.1.1-2726662

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade PowerStoreT OS to the patched releases:
    • 4.1.x branch → 4.1.0.6-2771237 or later
    • 4.3.x branch → 4.3.1.2-2771239 or later
  • If patching cannot be performed immediately: Restrict network access to the PowerStore management interface to trusted management networks only (e.g., via firewall/ACL segmentation and VPN-only access), and avoid exposing the management interface to untrusted or internet-facing networks. Monitor management interface access logs for unauthenticated or anomalous connection attempts until the patch can be applied.

References

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