Security readout for executives and security teams
Plain-English summary
Dell EMC ECS before version 3.5 can expose internal service resource information to a remote attacker without authentication. The reported impact includes sensitive system knowledge and high confidentiality, integrity, and availability impact, but the source bundle does not describe confirmed real-world attacks.
Executive priority
Treat this as high priority for any organization using Dell EMC ECS. The issue allows unauthenticated remote exposure of sensitive internal service information, and the vendor-defined affected range is clear: versions before 3.5.
Technical view
CVE-2020-5386 is a CWE-668 Exposure of Resource issue in Dell EMC ECS versions prior to 3.5. A remote unauthenticated attacker may access lists of DT objects for internally running services, gaining sensitive system information. CVSS v3.0 is 8.1 high with network attack vector and high attack complexity.
Likely exposure
Exposure is limited to organizations running Dell EMC Elastic Cloud Storage/ECS versions prior to 3.5. Risk is higher where ECS management or service interfaces are reachable by untrusted networks. The source bundle does not identify specific ports, configurations, or deployment modes.
Exploitation context
The source bundle reports remote unauthenticated access but high attack complexity. It does not cite active exploitation, and KEV status is false. No public exploit status is provided in the supplied evidence.
Researcher notes
Evidence is strong for affected product, version boundary, attack preconditions, and CVSS. Evidence is incomplete for exact reachable endpoint, exploit maturity, and detailed remediation beyond Dell’s security update. Avoid assuming broader Dell storage products are affected.
Mitigation direction
- Identify all Dell EMC ECS deployments and record running versions.
- Upgrade ECS versions prior to 3.5 following Dell advisory DSA-2020-208.
- Restrict untrusted network access to ECS administrative and service interfaces.
- Review Dell guidance for any additional supported mitigation or compensating controls.
Validation and detection
- Confirm no production ECS instance is running a version prior to 3.5.
- Verify ECS interfaces are not reachable from untrusted network segments.
- Review access logs for unusual unauthenticated requests to ECS services.
- Track remediation evidence against affected asset inventory.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-668: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-5386 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.1HighVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/security/en-us/details/545893/DSA-2020-208-Dell-EMC-ECS-Security-Update-for-an-Exposure-of-Resource-vulnerabilityCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Resource to Wrong Sphere
Exposure of Resource to Wrong Sphere represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.