CVE-2026-79952 Overview
CVE-2026-79952 affects Dell Secure Connect Gateway (SCG) 5.0 and stems from Improper Encoding or Escaping of Output [CWE-116]. An unauthenticated remote attacker can exploit the flaw to facilitate phishing attacks against users of the appliance. The issue impacts 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. Dell addressed the vulnerability in security advisory DSA-2026-382.
Critical Impact
Unauthenticated remote attackers can leverage improper output encoding in Dell SCG 5.0 to stage phishing content that appears to originate from a trusted appliance.
Affected Products
- Dell Secure Connect Gateway 5.0 Appliance versions prior to 5.36.00.16
- Dell Secure Connect Gateway 5.0 Application versions prior to 5.36.00.00
- Dell Secure Connect Gateway Virtual Edition
Discovery Timeline
- 2026-09-09 - CVE-2026-79952 published to NVD
- 2026-09-09 - Last updated in NVD database
Technical Details for CVE-2026-79952
Vulnerability Analysis
Dell Secure Connect Gateway is a remote support and telemetry appliance that connects Dell infrastructure to Dell support services. The vulnerability resides in how the appliance encodes or escapes output returned to clients. Attacker-controlled data reaches a response context without appropriate encoding, allowing crafted content to render in ways that mislead users. The flaw supports phishing scenarios in which an attacker delivers a link to a legitimate SCG endpoint that renders content chosen by the attacker.
The vulnerability requires no authentication and no user interaction with the appliance itself. Impact is limited to confidentiality with no direct integrity or availability effects on the appliance. The primary risk is credential harvesting or malware delivery against users who trust the SCG hostname.
Root Cause
The root cause is Improper Encoding or Escaping of Output [CWE-116]. Response-generation logic in the SCG web interface fails to neutralize characters or structures that carry meaning in the downstream rendering context. Without contextual encoding, attacker-supplied values are interpreted by the browser rather than treated as inert data.
Attack Vector
Exploitation occurs over the network against the SCG management interface. An attacker crafts a URL or request that embeds phishing content and delivers it to a target user. When the user follows the link, the SCG appliance returns the attacker-controlled content under its own trusted origin, enabling social-engineering attacks against administrators and support personnel.
No verified proof-of-concept code has been published. See the Dell Security Advisory DSA-2026-382 for vendor technical details.
Detection Methods for CVE-2026-79952
Indicators of Compromise
- Inbound HTTP or HTTPS requests to SCG endpoints containing encoded script fragments, HTML tags, or unusual URL-encoded payloads in query parameters.
- Web access logs showing SCG URLs shared through email, chat, or external referrers immediately before administrator authentication events.
- User reports of phishing pages hosted under a legitimate SCG hostname or IP address.
Detection Strategies
- Inspect SCG reverse-proxy and web server logs for query strings containing characters such as <, >, ", or javascript: sequences.
- Correlate external referrers to SCG login pages with subsequent credential submissions to identify likely phishing flows.
- Alert on SCG URLs appearing in inbound email links or web proxy logs where the request path includes reflected parameters.
Monitoring Recommendations
- Forward SCG appliance access logs to a central log platform and retain them for retrospective analysis.
- Monitor SCG appliance software versions and confirm they meet or exceed the fixed builds published in DSA-2026-382.
- Track administrator authentication anomalies, such as logins from new geographies immediately after clicking an SCG link.
How to Mitigate CVE-2026-79952
Immediate Actions Required
- Upgrade Dell SCG 5.0 Appliance to version 5.36.00.16 or later and Dell SCG 5.0 Application to 5.36.00.00 or later.
- Restrict network access to the SCG management interface to trusted administrative networks only.
- Brief administrators and support staff on phishing risk associated with SCG URLs and require verification of unexpected links.
Patch Information
Dell has published fixed builds in advisory DSA-2026-382. Apply Dell SCG 5.0 Appliance 5.36.00.16 or later, and Dell SCG 5.0 Application 5.36.00.00 or later. Full remediation details are available in the Dell Security Advisory DSA-2026-382.
Workarounds
- Place the SCG appliance behind a web application firewall configured to strip or block suspicious characters in request parameters.
- Limit exposure of the SCG web interface to internal management VLANs until patching is complete.
- Enforce email and web filtering rules that flag externally sourced links pointing to internal SCG hostnames.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
