CVE-2026-103778 Overview
CVE-2026-103778 affects Dell Command | Configure (DCC) versions prior to 5.2.3.35. The flaw stems from the use of a hard-coded cryptographic key within the application [CWE-321]. An unauthenticated attacker with local access to a system running a vulnerable version can exploit this weakness to recover sensitive data protected by the embedded key. Successful exploitation leads to information disclosure without affecting system integrity or availability. Dell published guidance under advisory DSA-2026-378 and released a fixed build to remediate the issue. The vulnerability was published to the National Vulnerability Database on 2026-10-06.
Critical Impact
A local attacker can leverage the hard-coded key to decrypt protected configuration data, exposing confidential information managed by Dell Command | Configure.
Affected Products
- Dell Command | Configure (DCC) versions prior to 5.2.3.35
Discovery Timeline
- 2026-10-06 - CVE-2026-103778 published to NVD
- 2026-10-06 - Last updated in NVD database
Technical Details for CVE-2026-103778
Vulnerability Analysis
Dell Command | Configure is a Windows-based utility used to configure BIOS settings on Dell commercial client platforms. The vulnerable builds embed a static cryptographic key inside the application binary or supporting modules. Because the key is identical across every installation, any attacker who extracts it from one host can decrypt protected material on all other hosts running the same software version.
The weakness is classified under [CWE-321: Use of Hard-coded Cryptographic Key]. Dell released fixed version 5.2.3.35 through advisory DSA-2026-378, which replaces or removes the static key material. Exploitation requires local access but no privileges and no user interaction, which lowers the operational bar for attackers who already hold a foothold on the endpoint.
Root Cause
The root cause is a cryptographic key compiled into shipped binaries or configuration artifacts of Dell Command | Configure. Static analysis of the installed files allows an attacker to recover the key through reverse engineering or string inspection. Once recovered, the key defeats the confidentiality guarantees of any data encrypted with it.
Attack Vector
An attacker with local access to a vulnerable workstation locates Dell Command | Configure components on disk and extracts the embedded key through binary analysis. The attacker then applies the key to decrypt protected configuration files or cached data belonging to DCC. Because the attack is local and does not require authentication to DCC itself, any user account on the host, including unprivileged ones, can perform the extraction and decryption steps.
No verified proof-of-concept exploit code has been published. See the Dell Security Update DSA-2026-378 for authoritative technical details.
Detection Methods for CVE-2026-103778
Indicators of Compromise
- Presence of Dell Command | Configure installations with versions below 5.2.3.35 reported by software inventory tools.
- Unexpected local processes reading DCC installation directories or binaries outside normal administrative workflows.
- File access events against DCC configuration artifacts by non-administrative user contexts.
Detection Strategies
- Inventory all endpoints running Dell Command | Configure and flag any build earlier than 5.2.3.35.
- Monitor endpoint telemetry for reverse-engineering tools such as debuggers, disassemblers, or string-dumping utilities touching DCC binaries.
- Correlate local logon events with subsequent access to DCC file paths to identify reconnaissance activity.
Monitoring Recommendations
- Enable file integrity monitoring on the Dell Command | Configure installation directory and alert on read access by non-standard processes.
- Centralize endpoint logs into a SIEM or data lake and build detections for suspicious access patterns against vendor configuration utilities.
- Track patch compliance for DCC through configuration management and alert when non-compliant hosts appear.
How to Mitigate CVE-2026-103778
Immediate Actions Required
- Upgrade Dell Command | Configure to version 5.2.3.35 or later on all affected endpoints.
- Review and rotate any secrets or configuration data that may have been protected by the hard-coded key.
- Restrict local access to systems running DCC to trusted administrative users where feasible.
Patch Information
Dell has published remediation guidance in advisory DSA-2026-378. Administrators should download and deploy the fixed Dell Command | Configure build 5.2.3.35 from the Dell Security Update DSA-2026-378. The update removes the hard-coded cryptographic key condition described in CVE-2026-103778.
Workarounds
- Remove Dell Command | Configure from endpoints that do not require it until patching is complete.
- Enforce least-privilege access controls so that only administrators can log on locally to systems with DCC installed.
- Apply application allow-listing to block execution of binary analysis utilities on endpoints running vulnerable DCC versions.
# Configuration example
# Verify installed Dell Command | Configure version on Windows
wmic product where "Name like 'Dell Command %% Configure'" get Name,Version
# Upgrade using the Dell-provided installer package
msiexec /i "Command_Configure_5.2.3.35.msi" /qn /norestart
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
