CVE-2026-35153 Overview
CVE-2026-35153 is an argument injection vulnerability affecting Dell PowerProtect Data Domain, a widely deployed enterprise backup and data protection appliance. The vulnerability stems from improper neutralization of argument delimiters in a command (CWE-88), which allows a highly privileged attacker with local access to inject malicious arguments and achieve arbitrary command execution with root privileges.
Critical Impact
Successful exploitation enables local privilege escalation to root, potentially compromising the entire data protection infrastructure and any sensitive backup data stored on the affected appliance.
Affected Products
- Dell PowerProtect Data Domain versions 7.7.1.0 through 8.7.0.0
- Dell PowerProtect Data Domain LTS2025 release versions 8.3.1.0 through 8.3.1.20
- Dell PowerProtect Data Domain LTS2024 release versions 7.13.1.0 through 7.13.1.60
Discovery Timeline
- 2026-04-17 - CVE-2026-35153 published to NVD
- 2026-04-17 - Last updated in NVD database
Technical Details for CVE-2026-35153
Vulnerability Analysis
This vulnerability is classified as an improper neutralization of argument delimiters in a command, commonly referred to as argument injection. The flaw exists within Dell PowerProtect Data Domain's command processing mechanisms, where user-controlled input is passed to system commands without proper sanitization of argument delimiters.
When a high-privileged user (such as an administrator) interacts with certain system commands on the appliance, the application fails to adequately neutralize special characters that serve as argument delimiters. An attacker can craft malicious input containing these delimiter characters to inject additional command arguments that were not intended by the application developers.
The local attack vector requirement means an attacker must already have some level of authenticated access to the Data Domain appliance. However, the ability to escalate to root privileges represents a significant risk, particularly in environments where backup infrastructure is a high-value target for ransomware operators and data exfiltration campaigns.
Root Cause
The root cause of CVE-2026-35153 is the insufficient validation and sanitization of input data that is subsequently used in system command construction. Specifically, the application does not properly neutralize argument delimiters such as spaces, quotes, or special shell characters before incorporating user-supplied data into command-line arguments. This allows an attacker to break out of the intended argument context and inject additional arguments or commands.
Attack Vector
The attack requires local access to the Dell PowerProtect Data Domain appliance with high privileges. An attacker with such access can exploit this vulnerability through the following general approach:
- The attacker identifies a command or function that processes user-controllable input
- The attacker crafts malicious input containing argument delimiter characters
- When the vulnerable command is executed, the injected arguments are processed as legitimate command arguments
- The injected arguments cause unintended command behavior, ultimately leading to arbitrary command execution with root privileges
The vulnerability exploits the trust relationship between the application and the underlying operating system, where improperly validated input bypasses security boundaries established by the application layer.
Detection Methods for CVE-2026-35153
Indicators of Compromise
- Unexpected process execution originating from Data Domain administrative interfaces
- Anomalous command-line arguments in system logs containing unusual delimiter patterns
- Privilege escalation events from administrative accounts to root
- Unusual file system modifications or new files created with root ownership in unexpected locations
Detection Strategies
- Monitor system logs on Data Domain appliances for commands with malformed or suspicious argument patterns
- Implement file integrity monitoring on critical system files and directories
- Review audit logs for unexpected privilege escalation events or root-level command execution
- Deploy endpoint detection solutions capable of identifying argument injection attack patterns
Monitoring Recommendations
- Enable verbose logging on Dell PowerProtect Data Domain appliances to capture detailed command execution history
- Establish baseline behavior for administrative command usage and alert on deviations
- Correlate authentication events with subsequent privileged command execution
- Monitor for signs of lateral movement or data exfiltration following potential exploitation attempts
How to Mitigate CVE-2026-35153
Immediate Actions Required
- Review the Dell Security Update DSA-2026-060 and apply the appropriate security patch immediately
- Audit all accounts with administrative access to Data Domain appliances and verify their legitimacy
- Implement the principle of least privilege, ensuring administrative access is limited to essential personnel only
- Enhance monitoring of administrative activities on affected appliances until patching is complete
Patch Information
Dell has released a security update addressing this vulnerability. Organizations should consult the Dell Security Update DSA-2026-060 for detailed patch information and upgrade instructions specific to their deployed version. Ensure you upgrade to a version that is not within the affected ranges:
- Upgrade from versions 7.7.1.0 through 8.7.0.0 to the latest patched release
- For LTS2025: Upgrade from versions 8.3.1.0 through 8.3.1.20 to the latest LTS2025 patched release
- For LTS2024: Upgrade from versions 7.13.1.0 through 7.13.1.60 to the latest LTS2024 patched release
Workarounds
- Restrict local access to Data Domain appliances to only essential personnel with verified business requirements
- Implement network segmentation to limit which systems can communicate with Data Domain management interfaces
- Enable multi-factor authentication for all administrative access if supported by your deployment
- Conduct regular access reviews and promptly revoke credentials for users who no longer require administrative access
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
