CVE-2026-79640 Overview
CVE-2026-79640 is a SQL Injection vulnerability affecting Dell Secure Connect Gateway (SCG) 5.0. The flaw exists in 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. The vulnerability is classified under [CWE-89] as Improper Neutralization of Special Elements used in an SQL Command. A low-privileged attacker with remote network access can exploit this issue to achieve unauthorized access to data managed by the appliance.
Critical Impact
Authenticated remote attackers can inject SQL statements to read or modify data within the Secure Connect Gateway database, compromising confidentiality and integrity.
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-2026-79640 published to NVD
- 2026-09-09 - Last updated in NVD database
- 2026-09-09 - Dell publishes security advisory DSA-2026-382
Technical Details for CVE-2026-79640
Vulnerability Analysis
Dell Secure Connect Gateway is a remote support and telemetry appliance that connects Dell infrastructure to Dell's support services. The vulnerability allows a low-privileged authenticated user to inject crafted SQL syntax through an application input that is passed to a backend database query without proper neutralization. Successful exploitation enables unauthorized access to database records, potentially exposing device inventory, telemetry, or credential material stored within the appliance.
The impact is limited to confidentiality and integrity of database contents; availability is not affected according to Dell's advisory. Because SCG typically resides on management network segments and holds credentials for connected Dell systems, any unauthorized read or modification of its data store carries downstream operational risk.
Root Cause
The root cause is improper neutralization of special characters within an SQL command path reachable by authenticated users. Input intended as data is interpreted as query syntax, allowing attackers to alter query semantics. The absence of parameterized queries or strict input validation for the affected endpoint enables the injection.
Attack Vector
Exploitation requires network access to the Secure Connect Gateway management interface and valid low-privilege credentials. No user interaction is required. The attacker submits crafted input containing SQL metacharacters to a vulnerable request handler, which concatenates the value into a database query executed by the appliance.
No public proof-of-concept exploit code is available for CVE-2026-79640. Refer to the Dell Security Update Advisory for vendor-supplied technical details.
Detection Methods for CVE-2026-79640
Indicators of Compromise
- Unexpected authenticated sessions from low-privilege SCG accounts issuing high volumes of requests containing SQL metacharacters such as single quotes, UNION, SELECT, or comment sequences.
- Database error messages or stack traces in SCG application logs referencing malformed queries.
- Anomalous outbound traffic from the SCG appliance following authenticated user activity.
Detection Strategies
- Inspect SCG web server and application logs for request parameters containing SQL injection payload patterns.
- Deploy web application firewall rules in front of the SCG management interface to identify injection attempts targeting Dell-specific endpoints.
- Correlate authentication events with subsequent database query anomalies to identify low-privileged accounts exhibiting attacker behavior.
Monitoring Recommendations
- Enable verbose audit logging on the SCG appliance and forward logs to a centralized SIEM for retention and analysis.
- Alert on privilege changes, new account creation, or database schema modifications performed by non-administrative accounts.
- Monitor network flows to and from the SCG management interface for deviations from baseline behavior.
How to Mitigate CVE-2026-79640
Immediate Actions Required
- Upgrade Dell SCG 5.0 Appliance to version 5.36.00.16 or later, and SCG 5.0 Application to version 5.36.00.00 or later, per the Dell advisory.
- Restrict network access to the SCG management interface to trusted administrative networks only.
- Audit local SCG accounts and remove or rotate credentials for accounts that are unused or shared.
Patch Information
Dell has released fixed versions addressing CVE-2026-79640. Apply Dell SCG 5.0 Appliance 5.36.00.16 or Dell SCG 5.0 Application 5.36.00.00 as documented in the Dell Security Update Advisory DSA-2026-382. Patching is the only vendor-supported remediation.
Workarounds
- Place the SCG management interface behind a VPN or jump host accessible only to authorized administrators.
- Enforce multi-factor authentication for all SCG accounts to reduce the risk of credential compromise leading to exploitation.
- Apply web application firewall signatures that block common SQL injection payloads targeting the SCG endpoints until patching is complete.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
