CVE-2026-46464 Overview
CVE-2026-46464 is an improper link resolution before file access vulnerability [CWE-59] affecting Dell PowerProtect Data Domain. The flaw resides in the Dell Data Domain Operating System (DDOS) and allows a high-privileged remote attacker to read files outside intended paths through symbolic link manipulation. Successful exploitation leads to information disclosure but does not affect integrity or availability. Dell tracks the issue under advisory DSA-2026-278.
Critical Impact
A remote attacker with high privileges can leverage symbolic link following to access sensitive files on the appliance, exposing confidential data stored or referenced by the backup platform.
Affected Products
- Dell PowerProtect Data Domain versions 7.7.1.0 through 8.7
- Dell PowerProtect Data Domain LTS2026 versions 8.6.1.0 through 8.6.1.10 and LTS2025 versions 8.3.1.0 through 8.3.1.30
- Dell PowerProtect Data Domain LTS2024 versions 7.13.1.0 through 7.13.1.70
Discovery Timeline
- 2026-07-03 - CVE-2026-46464 published to the National Vulnerability Database
- 2026-07-08 - Last updated in NVD database
Technical Details for CVE-2026-46464
Vulnerability Analysis
The vulnerability is a link following weakness [CWE-59] in the Dell Data Domain Operating System. When the affected component accesses a file path, it fails to verify whether the target is a symbolic link before performing the file operation. An authenticated attacker with high privileges can plant a symlink that redirects a privileged file read to a location the attacker would not normally access. The result is disclosure of file contents that the underlying process is authorized to read.
The attack is executed over the network, which is consistent with the remote management interfaces exposed by PowerProtect Data Domain appliances. Only confidentiality is impacted; the vulnerability does not permit modification of files or disruption of service.
EPSS data lists the probability of exploitation activity at 0.422% as of 2026-07-09.
Root Cause
The root cause is missing validation of file path targets before access. The affected code path does not check the link status of a supplied or referenced path, so operations follow symlinks to arbitrary destinations resolvable by the process context.
Attack Vector
An attacker authenticated to a privileged administrative interface on the Data Domain appliance places or influences a symbolic link that the vulnerable component subsequently reads. The privileged process reads the symlink target instead of the expected file, returning its contents to the attacker. Network reachability to the management plane and existing high-privilege credentials are prerequisites.
No public proof-of-concept, exploit code, or CISA KEV listing exists for CVE-2026-46464 at the time of writing.
Detection Methods for CVE-2026-46464
Indicators of Compromise
- Administrative sessions on the Data Domain appliance that create, modify, or reference symbolic links in unexpected directories.
- File read operations by privileged DDOS processes that resolve to paths outside standard configuration or log directories.
- Anomalous access from high-privileged accounts to management endpoints during off-hours or from unusual source addresses.
Detection Strategies
- Audit DDOS command history and system logs for symlink creation (ln -s) or manipulation followed by file-access operations from administrative processes.
- Alert on privileged account activity that deviates from established baselines for the PowerProtect Data Domain management interface.
- Correlate authentication events for high-privilege accounts against source geolocation and time-of-day baselines.
Monitoring Recommendations
- Forward DDOS syslog, audit logs, and authentication events to a centralized SIEM or data lake for retention and correlation.
- Track administrative logins to PowerProtect Data Domain appliances and require multi-factor authentication for all privileged access.
- Review Dell support advisory DSA-2026-278 for indicator updates and revised guidance.
How to Mitigate CVE-2026-46464
Immediate Actions Required
- Identify all Dell PowerProtect Data Domain systems and confirm the running DDOS version against the affected ranges.
- Apply the fixed DDOS release referenced in Dell advisory DSA-2026-278.
- Restrict management-plane access to trusted administrative networks and jump hosts only.
- Rotate credentials for any high-privilege Data Domain accounts and audit their recent activity.
Patch Information
Dell has published fixed releases in security advisory DSA-2026-278. Administrators should upgrade to the remediated DDOS versions specified for each supported track: mainline (7.7.1.0 through 8.7), LTS2026 (8.6.1.x), LTS2025 (8.3.1.x), and LTS2024 (7.13.1.x). Consult Dell for the exact fixed build applicable to your maintenance stream.
Workarounds
- Enforce least privilege on Data Domain administrative accounts and remove unnecessary high-privilege access.
- Isolate the Data Domain management interface on a dedicated management VLAN with strict access control lists.
- Require multi-factor authentication and monitor all sessions with recorded auditing until the patch is applied.
# Example: verify current Data Domain OS version before applying the DSA-2026-278 update
system show version
system upgrade status
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
