CVE-2026-44268: Dell PowerProtect Data Domain Permission Assignment Vulnerability

Technical summary

CVE-2026-44268 is classified as an incorrect permission assignment (CWE-732) affecting the Dell Data Domain operating system. The vulnerability has a CVSS 3.1 score of 4.4 (Medium severity) with a local attack vector, high privilege requirement, and high confidentiality impact. The attack requires local system access and high-level privileges; it cannot be exploited remotely. Affected versions span multiple release tracks: standard versions 7.7.1.0 through 8.6, 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. The vulnerability does not enable code execution or system modification—only unauthorized information disclosure.

Business impact

For organizations using Dell PowerProtect Data Domain for backup and deduplication, this vulnerability represents a data confidentiality risk for stored backups. If a privileged user with malicious intent or a compromised administrative account exists, they could access backup content beyond their assigned permissions. In regulated environments (healthcare, finance, legal), this could trigger compliance violations and breach notification obligations. The risk is containable because exploitation requires high privileges, but it should be evaluated against your admin access controls and whether you have environments with elevated-privilege accounts that don't need such broad file-system visibility.

Affected systems

Dell Data Domain deployments running any of these versions are affected: standard track 7.7.1.0–8.6, LTS2026 track 8.6.1.0–8.6.1.10, LTS2025 track 8.3.1.0–8.3.1.30, and LTS2024 track 7.13.1.0–7.13.1.70. Organizations should identify which release track and version their systems are on and determine patch availability. Users of versions prior to 7.7.1.0 or on later patched versions are unaffected. The LTS (Long-Term Support) tracks allow organizations on non-current major versions to remain supported; confirm your specific version and eligible patch level with Dell.

Exploitability

Exploitability is low in most environments. The vulnerability requires an attacker to already possess high-privileged local system access—typically root or administrative credentials. Remote exploitation is not possible. The attack vector is local-only, and the privilege requirement is explicitly high. In well-segmented environments with minimal local administrative account usage and strong privileged-account management, the risk is further reduced. However, organizations with legacy admin accounts, shared credentials, or frequent root-level operational access should treat this as a higher priority, as privilege misuse or insider threats could exploit it with minimal effort.

Remediation

Dell has released patched versions; you must verify the specific patch versions applicable to your release track from the Dell PowerProtect Data Domain security advisory. Patches are available for all affected major releases. Organizations should plan updates according to their change management process, prioritizing development and test environments first. For LTS deployments, confirm that an eligible patch version exists before upgrading or contact Dell support for guidance on upgrade paths. Test patches thoroughly in non-production environments to ensure no regression in deduplication or backup performance.

Patch guidance

Contact Dell or review the official PowerProtect Data Domain security advisory to identify the exact patch version for your affected release track (standard, LTS2026, LTS2025, or LTS2024). Do not assume a patch version without verification—upgrade paths and availability vary by track. Schedule patches during approved maintenance windows, as Data Domain updates typically require service restart. Implement pre-patch testing to verify backup and deduplication functionality remains intact. If you are already on an unaffected version (pre-7.7.1.0 or a known patched release), no action is required, but maintain current patching practices.

Detection guidance

Review file and directory permissions on affected Data Domain systems, especially those protecting sensitive backups. Check for overly permissive access to confidential backup metadata or content that may have been visible to high-privileged accounts before patching. Audit privileged account activity logs for any suspicious read operations on sensitive backups. After patching, validate that permission assignments reflect your intended access model. Consider implementing file integrity monitoring on critical backup directories to detect unauthorized access attempts in the future.

Why prioritize this

This vulnerability merits timely but not emergency patching. The CVSS score of 4.4 (Medium) reflects the limited attack scope and high-privilege requirement. However, Data Domain systems often hold business-critical and regulated backup data; any breach of backup confidentiality can have significant downstream compliance and operational impact. Organizations should patch within their standard maintenance window (typically 30–90 days), but align with your data sensitivity and backup criticality. Prioritize higher if you have strict regulatory requirements around data access controls or if you operate in high-security environments with multiple sensitive data types.

Risk score, explained

The CVSS 3.1 score of 4.4 (Medium) reflects: local-only attack vector (AV:L) reducing remote risk, high-privilege prerequisite (PR:H) limiting attacker pool, low complexity (AC:L) meaning exploitation is straightforward once privileges exist, and high confidentiality impact (C:H) because an attacker can read sensitive backup data. No integrity (I:N) or availability (A:N) impact is possible—this is a read-only disclosure issue. The score appropriately weights the practical difficulty of exploitation against the sensitivity of backup data.

Frequently asked questions