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Dell Secure Connect Gateway CVE-2026-79969

| EUVDEUVD-2026-74893 MEDIUM
Unsynchronized Access to Shared Data in a Multithreaded Context (CWE-567)
2026-09-09 security_alert@emc.com GHSA-2v8j-p6hh-2hj4
5.9
CVSS 3.1 · NVD
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Attack ChainAIDerived

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

  1. Access
    Identify exposed SCG endpoint
  2. Delivery
    Send high-volume concurrent requests
  3. Exploit
    Race condition corrupts shared resource
  4. Execution
    SCG service becomes unresponsive
  5. Impact
    Legitimate remote support denied

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Unsynchronized access to shared data
Exploitation Conditions

No special configuration is required beyond network reachability to the Dell SCG service. The CVSS vector specifies AV:N/AC:L/PR:N/UI:N, meaning unauthenticated remote exploitation against default-configured SCG 5.0 deployments. Exploitation is limited to SCG 5.0 Appliance versions before 5.36.00.16 and Application versions before 5.36.00.00; patched versions are not affected. The impact is constrained to availability (denial of service); no credential theft or persistent compromise is described.

Impact

The provided CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) contains a significant inconsistency: it asserts confidentiality impact (C:L) with no availability impact (A:N), yet the description and the 'Denial Of Service' tag both explicitly state DoS as the outcome. This contradiction suggests the vector may have been transposed from a different CVE in the same advisory (DSA-2026-382 covers multiple vulnerabilities). Based on the description, the realistic vector should reflect A:H with C:N. At AV:N/AC:L/PR:N/UI:N for a DoS primitive, the practical base score would be approximately 7.5, not 5.3. EPSS data is not provided; with no KEV listing and no POC, opportunistic exploitation is not currently confirmed. Real-world risk is moderate for environments exposing the SCG management interface to untrusted networks.

Exploit ScenarioDerived

An unauthenticated attacker sends a high volume of concurrent requests to the SCG gateway endpoint, triggering unsynchronized access to a shared resource such as a connection table or session store. The resulting race condition corrupts internal state or exhausts available resources, causing the SCG service to become unresponsive and denying legitimate remote support connectivity to enterprise clients.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 09, 2026

Race condition in Dell Secure Connect Gateway (SCG) 5.0 allows unauthenticated remote attackers to cause denial of service by exploiting improper synchronization of shared resources. Both the Appliance and Application deployment forms are affected across versions prior to 5.36.00.16 and 5.36.00.00 respectively, as confirmed by Dell advisory DSA-2026-382. No public exploit code has been identified at time of analysis.

RemediationAI

Upgrade Dell SCG 5.0 Appliance to version 5.36.00.16 or later and Dell SCG 5.0 Application to version 5.36.00.00 or later per Dell advisory DSA-2026-382. As a compensating control pending patching, restrict network access to SCG management and gateway endpoints to trusted internal IP ranges using firewall ACLs or network segmentation - this reduces the unauthenticated remote attack surface. Note that blocking network access broadly may impair remote support workflows that SCG is designed to facilitate, so scope restrictions to known management subnets where operationally feasible.

Affected VersionsENISA

Secure Connect Gateway 5.0 - Application 0 <5.36.00.00 or later
Secure Connect Gateway 5.0 - Appliance 0 <5.36.00.16 or later

Affects your stack

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Technical ContextAI · show details

Dell SCG (Secure Connect Gateway) is an enterprise remote support and connectivity gateway. The vulnerability is classified as CWE-567 (Unsynchronized Access to Shared Data in a Multithreaded Context), a subtype of race condition (CWE-362) where concurrent threads access shared state without proper locking or synchronization primitives. This class of flaw typically manifests when a request-handling path modifies shared data structures - connection pools, session tables, or request queues - without mutual exclusion, allowing a rapid flood of concurrent requests to corrupt state or exhaust resources. The vulnerability exists in SCG 5.0 Appliance versions prior to 5.36.00.16 and SCG 5.0 Application versions prior to 5.36.00.00.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI 7.5 HIGH

Network-reachable, no auth required, DoS-only impact; C:N because description and tags confirm availability loss, not confidentiality.

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

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

2
CVSS changed
Sep 09, 2026 - 20:22 NVD
5.3 (MEDIUM) 5.9 (MEDIUM)
Patch available
Sep 09, 2026 - 13:49 EUVD

DescriptionNVD

Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to 5.36.00.00, contains a Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to denial of service.

Threat Intelligence Overview

EPSS Score
0.2%
Top 92% exploitable
Prevalence
Medium
enterprise remote-support gateway, deployed in large organizations
Data Quality
5 sources
Confidence: Medium

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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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
No
Human Impact· derived
Medium

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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