CVE-2026-49814: Dell PowerProtect Data Domain OS Command Injection

Overview

CVE-2026-49814 is a high-severity vulnerability discovered in Dell PowerProtect Data Domain, a widely deployed enterprise backup and recovery appliance. The flaw is classified as an Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') — CWE-78.

A CVSS v3.1 base score of 7.2 has been assigned, reflecting the potential for an authenticated remote attacker to execute arbitrary operating system commands with elevated privileges on vulnerable systems.

Affected Versions

Technical Details

The vulnerability exists within the OS command processing layer of Dell PowerProtect Data Domain. An attacker who has already obtained authenticated access to the device — whether via administrative credentials, stolen sessions, or an upstream compromise — can inject specially crafted OS command sequences that bypass input sanitization controls.

Upon successful exploitation, the injected commands execute with elevated system privileges, potentially granting the attacker:

• Full control over the backup appliance
• Access to backup data stored on the device (which may contain sensitive or regulated data)
• Lateral movement opportunities within the backup network segment
• The ability to corrupt or destroy backup data — a common ransomware target

Impact Assessment

Backup appliances are high-value targets. Attackers who compromise Data Domain systems can:

1. Exfiltrate data from backup repositories
2. Destroy or encrypt backups, removing the victim's primary recovery option during a ransomware attack
3. Pivot to connected systems via backup agents and network connections

Organizations relying on Dell PowerProtect for disaster recovery should treat this vulnerability as critical to their resilience posture, even though the CVSS score reflects the need for authentication.

Recommended Actions

1. Apply patches — Dell has issued updated firmware addressing this vulnerability. Consult Dell's official security advisory for the specific patched versions for your release line.
2. Restrict administrative access — Limit who can reach the PowerProtect management interface and enforce MFA where possible.
3. Audit authentication logs — Review for anomalous login attempts or sessions prior to patching.
4. Segment backup networks — Ensure backup appliances are on isolated network segments with strict ACLs.
5. Monitor for indicators — Watch for unexpected process spawning or privilege escalation events on Data Domain appliances.

References

• NVD Entry — CVE-2026-49814
• Dell Security Advisories Portal