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Secure Connect Gateway EUVDEUVD-2026-85330

| CVE-2026-71178 LOW
Use of Non-Canonical URL Paths for Authorization Decisions (CWE-647)
2026-09-23 dell GHSA-fg6m-pjhc-g6f8
3.7
CVSS 3.1 · Vendor: dell
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Attack ChainAIDerived

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

  1. Access
    Reach SCG Policy Manager web endpoint
  2. Delivery
    Craft non-canonical/encoded URL path
  3. Exploit
    Authorization layer normalizes path inconsistently
  4. Execution
    Bypass access-control decision
  5. Impact
    Reach protected function (unauthorized access)

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V6 - Authentication Use of non-canonical URL paths
Exploitation Conditions

Requires network reachability to the Dell Secure Connect Gateway (SCG) Policy Manager web interface on a version prior to 5.34.00.16; no authentication or user interaction is required (PR:N/UI:N). Exploitation is LIMITED by AC:H - the attacker must find the specific non-canonical URL path representation that the Policy Manager's authorization logic normalizes differently from its request routing, which is not a generic single-request attack against defaults. Impact is confined to unauthorized access to protected functions with limited integrity effect (I:L); no confidentiality or availability impact is claimed by the vendor.

Impact

This is a low-priority issue despite being unauthenticated and network-reachable. Dell's own CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N = 3.7) already caps real-world impact: the only consequence is limited unauthorized access mapped to I:L, with no confidentiality (C:N) or availability (A:N) impact, and AC:H reflects that the attacker must discover and craft a specific non-canonical/encoded URL variant that the Policy Manager normalizes differently for authorization versus routing. No EPSS score, no CISA KEV listing, and no public exploit code are present in the provided intelligence, so there is no signal of active or imminent exploitation. The signals are internally consistent (network CWE-647 path-confusion authz bypass matches AV:N/PR:N/AC:H), so no attack-vector conflict needs vendor verification. Note the description says the flaw 'leads to Unauthorized access' yet Dell scored only integrity (I:L) with C:N - if unauthorized access in practice exposes data, real confidentiality impact could be understated; verify affected endpoint behavior with Dell. Net: a genuine defect worth patching in the normal cycle, not an emergency.

Exploit ScenarioDerived

A remote unauthenticated attacker who can reach the SCG Policy Manager web interface sends requests using non-canonical URL path forms (e.g., encoded separators, path traversal segments, or trailing-character tricks) that the authorization layer evaluates differently from the request router, letting a request slip past an access-control check to reach a protected function. Because CVSS marks AC:H, the attacker must first identify the exact path-normalization discrepancy through trial and error. No public proof-of-concept exploit is identified at time of analysis.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 23, 2026

Unauthorized access to protected functionality affects Dell Secure Connect Gateway (SCG) Policy Manager installations running versions prior to 5.34.00.16, where authorization decisions are made against non-canonical URL paths (CWE-647). Remote unauthenticated attackers (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N, base 3.7) must craft an alternate but equivalent path representation that the Policy Manager's authorization logic normalizes differently from its request routing, allowing them to reach functions intended to be restricted - with only a limited integrity impact and no confidentiality or availability impact claimed by the vendor. No public exploit code or confirmed active exploitation (CISA KEV) has been identified at time of analysis; the high attack complexity (AC:H) reflects that this is not a generic single-request attack against default configuration, which is why the issue is assessed as low priority despite being network-reachable and unauthenticated.

RemediationAI

Vendor-released patch: Dell Secure Connect Gateway (SCG) Policy Manager 5.34.00.16 or later, delivered through the DSA-2026-385 security update at https://www.dell.com/support/kbdoc/en-ca/000503592/dsa-2026-385-security-update-for-dell-secure-connect-gateway-policy-manager-multiple-vulnerabilities - upgrade every instance below 5.34.00.16 and validate the applied build number after the update completes, since the advisory groups multiple CVEs and partial application can leave the canonicalization fix absent. Because no standalone workaround is documented in the reference data, compensating controls should focus on reachability: restrict the Policy Manager web interface to a dedicated administrative VLAN or management subnet and enforce allow-list firewall rules for only the administrators who need it (trade-off: reduced remote-management flexibility and possible breakage of automated monitoring or integration accounts that connect from other segments). Fronting the interface with a reverse proxy or WAF that rejects requests containing non-canonical path forms - percent-encoded separators, dot-segments, duplicate or trailing slashes - can defeat the normalization mismatch before it reaches the application, but this mitigation carries a real risk of false positives that block legitimate client traffic and must be tuned in monitor-only mode first. Note that no public exploit code or confirmed active exploitation has been identified at time of analysis, so these compensating controls are precautionary rather than emergency measures; the version upgrade remains the only complete fix.

Affected VersionsENISA

Secure Connect Gateway (SCG) Policy Manager 0 <5.36.00.16 or later

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Technical ContextAI · show details

The root cause class is CWE-647, Use of Non-Canonical URL Paths for Authorization Decisions. In web applications, the component that enforces access control (an authorization filter, servlet mapping, or reverse-proxy ACL) and the component that actually dispatches the request to a handler (the router or framework) frequently apply different path-normalization rules. When the security check evaluates the raw, non-canonical request-URI while the router decodes and canonicalizes it - or vice versa - representations such as percent-encoded characters, dot-segments, duplicate or trailing slashes, path-case variations, and equivalent-but-unnormalized forms can resolve to the same endpoint for routing purposes while failing to match (or being skipped by) the authorization rule. Dell Secure Connect Gateway Policy Manager is the management/policy component of the Secure Connect Gateway appliance family, exposing a web interface that governs gateway policy configuration. The CPE record cpe:2.3:a:dell:secure_connect_gateway_(scg)_policy_manager:*:*:*:*:*:*:*:* identifies the affected product line with the vulnerable version range expressed only as 'prior to 5.34.00.16'. The AC:H rating in the assessed vector is consistent with the exploitation prerequisite: an attacker must identify the specific non-canonical path representation that this particular authorization/routing pair handles inconsistently, which requires probing rather than a known generic payload; the resulting impact is scoped to unauthorized access with limited integrity effect (I:L) and no stated confidentiality or availability loss.

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Severity by source

Vendor (dell) PRIMARY 3.7 LOW
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
vuln.today AI 3.7 LOW

Remote unauthenticated (AV:N/PR:N/UI:N); AC:H because the attacker must discover the exact path-normalization discrepancy; only limited unauthorized access maps to I:L with C:N/A:N per Dell.

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

Primary rating from Vendor (dell).

CVSS VectorVendor: dell

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

Lifecycle Timeline

1
Patch available
Sep 23, 2026 - 15:02 EUVD

DescriptionCVE.org

Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains an Use of Non-Canonical URL Paths for Authorization Decisions vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Unauthorized access.

Threat Intelligence Overview

EPSS Score
0.2%
Top 96% exploitable
Prevalence
Low
niche enterprise Dell support/monitoring gateway, limited production footprint
Data Quality
4 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 LOW
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
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
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Low

Priority Score

18
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +18
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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