CVE-2026-23777: Dell PowerProtect Data Domain Info Leak

CVE-2026-23777 Overview

Dell PowerProtect Data Domain with Data Domain Operating System (DD OS) contains an exposure of sensitive information to an unauthorized actor vulnerability. This information disclosure flaw affects multiple Feature Release and Long-Term Support (LTS) versions of the DD OS, potentially allowing low-privileged attackers with remote network access to gain unauthorized access to sensitive information.

Critical Impact

Low-privileged attackers can remotely exploit this vulnerability to access sensitive information, potentially compromising backup data confidentiality in enterprise environments.

Affected Products

• Dell PowerProtect Data Domain with DD OS Feature Release versions 7.7.1.0 through 8.5
• Dell PowerProtect Data Domain with DD OS LTS2025 release versions 8.3.1.0 through 8.3.1.20
• Dell PowerProtect Data Domain with DD OS LTS2024 release versions 7.13.1.0 through 7.13.1.50

Discovery Timeline

• April 17, 2026 - CVE-2026-23777 published to NVD
• April 17, 2026 - Last updated in NVD database

Technical Details for CVE-2026-23777

Vulnerability Analysis

This vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The flaw exists in Dell PowerProtect Data Domain appliances running vulnerable versions of the Data Domain Operating System. The vulnerability enables information disclosure through improper access controls, allowing authenticated users with low privileges to access data beyond their authorization scope.

PowerProtect Data Domain systems are enterprise backup and recovery appliances commonly deployed to protect critical business data. The information exposure vulnerability could allow attackers to enumerate sensitive configuration details, user information, or potentially backup metadata that should be restricted to administrative users only.

Root Cause

The vulnerability stems from insufficient access control mechanisms within the DD OS that fail to properly restrict information access based on user privilege levels. This allows authenticated users with minimal permissions to query or retrieve sensitive data that should only be accessible to administrators or higher-privileged accounts.

Attack Vector

The attack requires network access and valid low-privileged credentials on the target Dell PowerProtect Data Domain system. An attacker would authenticate to the system with minimal permissions and then exploit the information exposure flaw to access sensitive data beyond their authorization level.

The exploitation does not require user interaction and can be conducted remotely over the network. While the attacker needs some level of authenticated access, the low privilege requirement significantly lowers the barrier to exploitation. The scope is unchanged, meaning the vulnerability only impacts the confidentiality of the vulnerable component itself without affecting other systems.

Detection Methods for CVE-2026-23777

Indicators of Compromise

• Unusual data access patterns from low-privileged user accounts on Data Domain appliances
• Unexpected API calls or CLI commands from non-administrative users requesting sensitive system information
• Authentication logs showing repeated queries for configuration or metadata by standard user accounts

Detection Strategies

• Monitor DD OS audit logs for access attempts to restricted information by low-privileged accounts
• Implement alerting on anomalous data retrieval patterns that exceed normal user behavior baselines
• Review user permission assignments and flag accounts with access to sensitive data beyond their role requirements

Monitoring Recommendations

• Enable comprehensive audit logging on all PowerProtect Data Domain appliances
• Configure SIEM integration to correlate access events with user privilege levels
• Establish baseline normal behavior for low-privileged accounts and alert on deviations

How to Mitigate CVE-2026-23777

Immediate Actions Required

• Review and audit all user accounts on affected PowerProtect Data Domain systems to ensure principle of least privilege
• Apply network segmentation to restrict access to Data Domain management interfaces
• Monitor for unusual information access patterns from non-administrative accounts
• Plan for immediate patching to remediated DD OS versions

Patch Information

Dell has released security updates to address this vulnerability. Refer to the Dell Security Advisory DSA-2026-060 for detailed patch information and updated DD OS versions. Organizations should prioritize applying the security update to all affected PowerProtect Data Domain appliances.

Workarounds

• Restrict network access to Data Domain management interfaces to trusted administrative networks only
• Implement strict user account management and remove unnecessary low-privileged accounts
• Enable enhanced audit logging to detect potential exploitation attempts until patches can be applied

# Example: Restrict management interface access via firewall rules
# Limit access to DD OS management to specific administrator IP ranges
# Consult Dell documentation for DD OS specific access control configurations