CVE-2026-49814: Dell PowerProtect Data Domain OS Command Injection (CVSS 7.2)

Technical summary

CVE-2026-49814 is an OS command injection vulnerability (CWE-78) in Dell PowerProtect Data Domain that stems from improper neutralization of special elements in user-supplied input passed to OS commands. The vulnerability requires high privilege authentication but does not require user interaction; the attack vector is network-accessible. An authenticated attacker can craft malicious input through application interfaces that execute unsanitized commands at the operating system level. With a CVSS 3.1 score of 7.2 (HIGH severity), the vulnerability exhibits high impact across confidentiality, integrity, and availability—meaning an attacker gains the ability to read, modify, or disrupt system functionality.

Business impact

Data Domain appliances are critical infrastructure for enterprise backup and disaster recovery. Compromise via command injection could allow attackers to: exfiltrate backup data, corrupt backup integrity, disable backup operations, or pivot to other systems that depend on Data Domain for recovery. For organizations relying on these systems for compliance, regulatory obligations, or ransomware recovery strategies, even temporary unavailability represents significant business risk. The attack surface includes internal users, potentially compromised administrative accounts, and any attacker who obtains legitimate credentials through phishing or credential compromise.

Affected systems

Dell PowerProtect Data Domain is affected across multiple release streams: standard versions 7.7.1.0 through 8.7, LTS2026 releases 8.6.1.0 through 8.6.1.10, LTS2025 releases 8.3.1.0 through 8.3.1.30, and LTS2024 releases 7.13.1.0 through 7.13.1.70. Organizations must identify which release branch and version they operate; LTS customers may have different patch availability timelines than standard release users.

Exploitability

This vulnerability requires high privilege credentials and network access but is otherwise straightforward to exploit once authentication is obtained—there is no complex race condition, memory corruption technique, or code gadget chain needed. The CVSS vector indicates low attack complexity (AC:L), meaning reliable exploitation is feasible. Notably, the vulnerability has not been added to CISA's Known Exploited Vulnerabilities (KEV) catalog as of the publication date, suggesting limited real-world weaponization so far. However, the attack surface includes disgruntled employees with backup administrator roles, lateral movement by attackers inside the network perimeter, and compromised user accounts from phishing campaigns.

Remediation

Remediation requires applying vendor patches to upgrade affected systems to patched versions. Dell has released or will release fixes for each affected release branch; verify the specific patched version numbers through the official Dell PowerProtect Data Domain security advisory. In environments where immediate patching is not feasible, compensating controls include restricting network access to Data Domain appliances to trusted administrative networks, enforcing multi-factor authentication for administrative accounts, and monitoring OS command execution logs for suspicious patterns. Credential hygiene—limiting the number of users with high privileges and rotating backup administrator passwords—reduces the likelihood of credential-based exploitation.

Patch guidance

Contact Dell or review the official PowerProtect Data Domain security advisory to identify the patched version for your specific release branch (standard, LTS2026, LTS2025, or LTS2024). Patching should be prioritized for any Data Domain appliance accessible from the network or hosting sensitive backup data. Test patches in a non-production environment first to ensure compatibility with existing backup jobs and recovery procedures. Plan patching during a maintenance window to minimize disruption to backup schedules. Verify the patch has been applied by checking the installed version number post-update.

Detection guidance

Monitor Data Domain appliance logs for unexpected OS command execution, particularly commands invoked through the application layer that contain suspicious metacharacters (pipes, semicolons, backticks, or dollar-sign expansions). Endpoint detection and response (EDR) solutions, if deployed on or near the Data Domain system, may flag unusual process spawning from the Data Domain service. Network intrusion detection systems should monitor for exploitation attempts that include command injection payloads in API calls or web requests to Data Domain management interfaces. Establish a baseline of normal administrative activity and alert on deviations such as commands originating from non-administrative user accounts or unusual command patterns.

Why prioritize this

Despite the HIGH CVSS score of 7.2, this vulnerability should be prioritized based on the criticality of Data Domain in enterprise infrastructure: compromise directly affects data protection posture and recovery capabilities. The requirement for high privileges lowers immediate external threat likelihood but increases insider risk and lateral-movement threat scenarios. Organizations with Data Domain appliances should patch within 30 days; those in regulated industries or with internet-facing backup infrastructure should prioritize even more aggressively.

Risk score, explained

The CVSS 3.1 score of 7.2 reflects high impact (confidentiality, integrity, availability all compromised) and network accessibility but is tempered by the high privilege requirement (PR:H). In practice, risk is elevated by the fact that backup systems are lucrative targets for attackers seeking to disable recovery capabilities, making the business context more severe than the base CVSS alone suggests. Organizations with weak credential governance or exposed administrative interfaces should treat this as CRITICAL.

Frequently asked questions