CVE-2026-49815: Dell PowerProtect Data Domain OS Command Injection (CVSS 7.2)

Technical summary

CVE-2026-49815 is an OS command injection vulnerability (CWE-78) in Dell PowerProtect Data Domain resulting from improper neutralization of special characters in OS commands. The vulnerability exists across four affected version families: standard releases 7.7.1.0–8.7, LTS2026 (8.6.1.0–8.6.1.10), LTS2025 (8.3.1.0–8.3.1.30), and LTS2024 (7.13.1.0–7.13.1.70). An attacker with high privilege credentials and remote network access can inject shell metacharacters into a command parameter, causing the OS to execute unintended instructions. The CVSS 3.1 vector (7.2/HIGH, AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H) reflects network accessibility, low attack complexity, high privilege requirement, and full confidentiality, integrity, and availability impact.

Business impact

Compromise of a Data Domain system exposes the integrity of your backup infrastructure—a foundational pillar of disaster recovery and ransomware defense. An attacker gaining code execution can corrupt, exfiltrate, or delete backups; install persistent implants; or pivot laterally into protected production systems. For organizations relying on Data Domain for compliance-mandated data retention, this vulnerability risks regulatory violations and loss of recovery options during an active incident. The requirement for high privilege mitigates risk somewhat, but insider threats or compromised administrative credentials remain credible attack vectors.

Affected systems

Dell PowerProtect Data Domain systems across four version families are affected: standard track 7.7.1.0 through 8.7, LTS2026 branch 8.6.1.0 through 8.6.1.10, LTS2025 branch 8.3.1.0 through 8.3.1.30, and LTS2024 branch 7.13.1.0 through 7.13.1.70. Verify your deployed version against Dell's product documentation. Note that LTS (Long-Term Support) versions follow separate patch schedules; confirm which branch and exact version your environment runs before assessing patch timeline.

Exploitability

Exploitation is feasible but requires two prerequisites: the attacker must hold high-privileged credentials (administrator or equivalent role) and must have network access to the Data Domain management interface or API endpoint exposing the vulnerable function. This is not a pre-authentication vulnerability and does not require user interaction. In environments where administrative credentials are well-controlled, risk is reduced; however, compromised service accounts, credential spraying following a broader compromise, or insider threats elevate practical exploit likelihood. The low attack complexity means no special tooling or timing is needed once access is gained.

Remediation

Contact Dell for patched versions addressing this vulnerability across each affected release branch. Patches are expected to be available for standard, LTS2026, LTS2025, and LTS2024 tracks. Until patches are deployed, enforce strict network segmentation around Data Domain systems, restrict administrative access to a minimal trusted group, enforce multi-factor authentication on administrative accounts, and enable detailed audit logging of administrative commands to detect exploitation attempts.

Patch guidance

Verify your Data Domain version and release branch (standard, LTS2026, LTS2025, or LTS2024) in the system administration interface or via Dell support documentation. Once Dell releases patched versions for your branch, schedule patching during a maintenance window aligned with your backup schedule to avoid disruption. Test patches in a non-production environment first. Apply patches to all affected instances. Consult Dell's advisories and release notes for specific version numbers and upgrade procedures for your branch.

Detection guidance

Monitor Data Domain audit logs and system command logs for: (1) unusual administrative commands, especially those containing shell metacharacters (pipes, semicolons, backticks, $(), redirects) in parameters; (2) administrative login activity from unexpected sources or at anomalous times; (3) changes to system files or configurations not initiated through normal administration workflows; (4) network connections from the Data Domain system to unexpected external hosts. Deploy security information and event management (SIEM) rules to flag suspicious admin activity. Enable verbose logging on the Data Domain management interface and retain logs for forensic analysis.

Why prioritize this

This vulnerability merits high priority due to its HIGH severity rating, impact on backup infrastructure integrity, and the confluence of network accessibility with potential for complete system compromise. Although high privilege is required, the breach of a backup system has catastrophic business consequences—loss of recovery capabilities during an incident, potential regulatory non-compliance, and extended recovery timelines. Organizations should prioritize patching within their next maintenance window, particularly if administrative access controls are not tightly restricted.

Risk score, explained

The CVSS 3.1 score of 7.2 (HIGH) reflects the combination of network attack vector, low attack complexity, and full C/I/A impact. The high-privilege requirement prevents a 9+ score but does not negate the risk, as administrative compromises are common post-breach vectors. The unchanged baseline score from publication to last modification suggests no new information has altered the severity assessment.

Frequently asked questions