CVE-2026-79966 Overview
CVE-2026-79966 affects Dell Secure Connect Gateway (SCG) 5.0, both the Appliance and Application editions. The flaw is an Insertion of Sensitive Information into Log File weakness [CWE-532]. Dell SCG writes sensitive data into log files that a low-privileged local user can read, exposing information that should remain confidential. A local attacker with valid low-privilege credentials on the host can review these log artifacts and harvest data useful for follow-on attacks. Dell tracks the issue under advisory DSA-2026-382 and has released fixed builds for both editions.
Critical Impact
A low-privileged local user can read sensitive data written to Dell SCG log files, enabling information disclosure that supports further attacks against the appliance or connected Dell support workflows.
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 SCG Virtual Edition deployments covered by advisory DSA-2026-382
Discovery Timeline
- 2026-09-09 - CVE-2026-79966 published to NVD
- 2026-09-09 - Last updated in NVD database
Technical Details for CVE-2026-79966
Vulnerability Analysis
Dell Secure Connect Gateway is the remote support and telemetry bridge between Dell enterprise hardware and Dell back-end services. The product writes operational and diagnostic events to log files on the appliance. In affected versions, those log records include sensitive information rather than redacted or hashed values. Any local account with permission to read the log directory can view the exposed data. The vulnerability requires local access and low privileges, and it does not require user interaction. Impact is limited to confidentiality; the flaw does not modify data or affect availability of the gateway.
Root Cause
The root cause is improper handling of sensitive fields during log generation, categorized under CWE-532: Insertion of Sensitive Information into Log File. Log formatters in the affected SCG builds emit sensitive values in cleartext instead of applying masking, truncation, or exclusion. Because log files typically inherit permissions that allow service and support accounts to read them, the sensitive content becomes reachable by any local principal in those groups.
Attack Vector
Exploitation is local. An attacker first obtains a low-privileged shell or interactive session on the SCG host, for example through an existing operator account, a compromised service account, or a chained vulnerability that yields local execution. The attacker then reads the SCG log files from disk and extracts the exposed values. No network reachability to the gateway is required, and no privilege escalation is needed to view the logs. The vulnerability is described in prose only; no public proof-of-concept, exploit code, or CISA KEV listing exists for CVE-2026-79966. Refer to the Dell Security Update DSA-2026-382 for vendor technical details.
Detection Methods for CVE-2026-79966
Indicators of Compromise
- Unexpected read access to SCG log directories by non-administrative local accounts.
- Copy, archive, or exfiltration operations targeting SCG log files such as tar, zip, or scp events referencing the log path.
- Presence of SCG log content in user home directories, temporary paths, or outbound file transfers.
Detection Strategies
- Inventory Dell SCG Appliance and Application instances and compare installed versions against 5.36.00.16 and 5.36.00.00.
- Audit filesystem permissions on SCG log directories and flag deviations from the vendor baseline.
- Correlate local logon events on the SCG host with subsequent access to log files by accounts that do not require them.
Monitoring Recommendations
- Forward SCG host audit logs and file access telemetry to a central analytics platform for review.
- Alert on interactive sessions by service accounts that normally run non-interactively on the SCG host.
- Track outbound transfers from the SCG appliance to non-Dell destinations to detect log exfiltration.
How to Mitigate CVE-2026-79966
Immediate Actions Required
- Upgrade Dell SCG 5.0 Appliance to version 5.36.00.16 or later.
- Upgrade Dell SCG 5.0 Application to version 5.36.00.00 or later.
- Review and reduce the set of local accounts that can log in to the SCG host or read its log directories.
- Rotate any credentials, tokens, or secrets that may have appeared in SCG logs prior to the upgrade.
Patch Information
Dell has released fixed builds through advisory DSA-2026-382. Apply the vendor-supplied updates for both the Appliance and Application editions according to Dell's upgrade procedure for Secure Connect Gateway Virtual Edition.
Workarounds
- Restrict local access to the SCG host to a minimal set of administrators until the patch is applied.
- Tighten filesystem permissions on SCG log directories so only administrative accounts can read them.
- Purge or archive existing SCG log files to reduce the window of exposure after patching.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
