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Dell Storage Manager CVE-2025-43994

HIGH
Missing Authentication for Critical Function (CWE-306)
2025-10-24 security_alert@emc.com
7.5
CVSS 3.1 · NVD
View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Reach DSM management endpoint over network
  2. Exploit
    Invoke unauthenticated critical function
  3. Impact
    Retrieve exposed sensitive information

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication required for critical functions
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires network reachability to the Dell Storage Manager (DSM) Data Collector / management interface, which exposes a critical function that performs no authentication check (CWE-306); against an affected build such as DSM 20.1.21, a remote attacker needs no credentials, no user interaction, and no special configuration to trigger it (AV:N/AC:L/PR:N/UI:N). The practical limiting factor is network exposure of the management plane: DSM is typically deployed on an internal storage/management network, so risk is substantially reduced when that interface is segmented and not reachable from untrusted zones, and elevated where it is exposed to broad internal access or the internet. Impact is confined to information disclosure (C:H, I:N, A:N) - no data modification or service disruption results directly.

Impact

Multiple signals converge on a MODERATE, not top-tier, priority. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes a network-reachable, low-complexity, unauthenticated flaw - attractive on paper - but the impact is scoped strictly to confidentiality (C:H/I:N/A:N), i.e. information disclosure only, with no integrity or availability impact and no scope change (S:U), consistent with the CWE-306 Missing Authentication classification. EPSS is low at 0.60% (47th percentile), indicating the predictive models do not expect near-term mass exploitation, and the CVE is NOT on CISA KEV with no public POC identified, so there is no evidence of active or at-scale exploitation. These signals are internally consistent rather than conflicting: an easily-reachable unauthenticated bug that nonetheless scores only 7.5 because it leaks data rather than granting code execution or control. The main caveat is informational: the Dell advisory (DSA-2025-393) was not fetched in this analysis, so the exact nature of the disclosed information (credentials, configuration, SAN topology, or less sensitive data) is unconfirmed - if the leaked data includes credentials or tokens enabling follow-on access, real-world risk would be higher than the standalone C:H suggests. Treat as a prioritized patch for internet- or management-network-exposed instances, but not an emergency absent evidence the disclosure chains into fuller compromise.

Exploit ScenarioDerived

An attacker with network access to the Dell Storage Manager management interface sends a request to a critical function that fails to enforce authentication, retrieving sensitive information without any credentials or user interaction. Because CVSS indicates AV:N/AC:L/PR:N/UI:N, no special timing or victim action is required, though the attacker must first be able to reach the management endpoint. No public exploit code was identified at time of analysis.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.6% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 08, 2026

Missing authentication on a critical function in Dell Storage Manager (DSM) - the management application for Dell Storage Center arrays - lets unauthenticated remote attackers invoke that function and disclose sensitive information from affected builds, including DSM 20.1.21 and the 2020 R1, R1.2, R1.10 and R1.20 releases. Per the assessed vector (CVSS 7.5, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), exploitation requires only network reachability to the DSM Data Collector / management interface, with no credentials, user interaction, or special configuration; impact is limited to information disclosure, with no data modification or service disruption. No public exploit code and no confirmed active exploitation were identified at time of analysis, and EPSS is low (0.60%, 47th percentile), so real-world risk is driven mainly by whether the management plane is exposed beyond a segmented storage/management network.

RemediationAI

Patch status: patch available per vendor advisory. Dell documents the fix in DSA-2025-393 (https://www.dell.com/support/kbdoc/en-us/000382899/dsa-2025-393-security-update-for-storage-center-dell-storage-manager-vulnerabilities); the available data does not specify an exact fixed build number, so consult that advisory for the supported DSM release to install and upgrade DSM 20.1.21 and the affected 2020 R1 / R1.2 / R1.10 / R1.20 builds accordingly, validating compatibility with the managed Storage Center arrays before rolling out. Until the upgrade is complete, the highest-value compensating control is to remove reachability to the DSM Data Collector and management interface: block the relevant management ports at network and host firewalls, restrict access to a dedicated management VLAN, and require VPN or jump-host access for administrators - this directly neutralizes the PR:N/AV:N path, though it adds friction to routine administration and can break Discovery/Data Collector communications if ranges are over-restricted (whitelist only the required array and admin subnets to limit that). Where DSM must remain broadly reachable, add monitoring/alerting on unexpected calls to the management interface, since the underlying defect is an authentication bypass and requests will appear without a prior successful login. No public exploit code was identified, so emergency change windows are not mandated by exploit activity, but exposure-based prioritization is appropriate: internet- or broad-internal-facing DSM should be patched first.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The root cause is CWE-306, Missing Authentication for Critical Function: a function exposed by Dell Storage Manager performs a sensitive operation without verifying that the caller has authenticated, so a request that reaches it is processed as if trusted. Dell Storage Manager (DSM) is the client/management layer that administers Dell Storage Center (SC series) SAN storage; the Data Collector service aggregates array telemetry and exposes a management interface used for discovery, monitoring, and configuration. The affected artifacts are identified by CPE as dell:storage_manager, spanning the 2020 R1 family (R1, R1.2, R1.10, R1.20) and the versioned 20.1.21 build. Because the missing check sits on a reachable interface and the CVSS vector is AV:N/AC:L/PR:N/UI:N with scope unchanged, the attacker needs no foothold on the host - only IP reachability to the DSM management plane. The impact profile (C:H/I:N/A:N) is confidentiality-only: the attacker can read data the function exposes but cannot, through this defect alone, alter configuration or take the service down. Authentication requirements are confirmed as unauthenticated (PR:N in the supplied vector), and no user interaction is required (UI:N).

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 7.5 HIGH

Missing authentication on a network-reachable function allows unauthenticated remote access (AV:N/AC:L/PR:N/UI:N); impact is confidentiality-only information disclosure, so C:H with I:N/A:N and no scope change.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionNVD

Dell Storage Center - Dell Storage Manager, version(s) DSM 20.1.21, contain(s) a Missing Authentication for Critical Function vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Information disclosure.

Executive ViewAI

Why It Matters

Dell Storage Manager, the management application for Dell Storage Center arrays, has a high-severity unauthenticated information-disclosure vulnerability in affected builds including DSM 20.1.21 and 2020 R1, R1.2, R1.10, and R1.20. An attacker who can reach the DSM Data Collector/management interface over the network could read sensitive information without credentials or user interaction, while data modification and service disruption are not impacted. No public exploit identified at time of analysis and no confirmed active exploitation; leadership should prioritize reducing management-plane exposure because the risk is greatest where DSM is reachable beyond a segmented storage-management network.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis; restrict network reachability to the DSM Data Collector/management interface using firewall ACLs, VLAN segmentation, VPN, and allowlisting; limit access to trusted administrators; monitor DSM and network logs for unauthorized access attempts; and prioritize isolating DSM 20.1.21 and 2020 R1/R1.2/R1.10/R1.20 management planes.

Threat Intelligence Overview

EPSS Score
0.6%
Top 53% exploitable
Prevalence
Medium
enterprise Dell Storage Center/Compellent SAN management software, common but vendor-specific
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.6%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:a:dell:storage_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:dell:storage_manager:2020:r1:*:*:*:*:*:*
cpe:2.3:a:dell:storage_manager:2020:r1.10:*:*:*:*:*:*
cpe:2.3:a:dell:storage_manager:2020:r1.2:*:*:*:*:*:*
cpe:2.3:a:dell:storage_manager:2020:r1.20:*:*:*:*:*:*
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