CVE-2026-53482 Overview
CVE-2026-53482 is an integer overflow vulnerability [CWE-190] affecting Dell PowerProtect Data Domain systems running the Dell Data Domain Operating System. The flaw allows an unauthenticated remote attacker to trigger a denial of service condition by exploiting arithmetic wraparound in a network-accessible component. Dell published advisory DSA-2026-278 covering this and other issues affecting the platform.
Critical Impact
An unauthenticated remote attacker can trigger a denial of service condition on Dell PowerProtect Data Domain appliances, disrupting backup and recovery operations across enterprise environments.
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
- 2026-07-08 - CVE-2026-53482 published to NVD
- 2026-07-09 - Last updated in NVD database
Technical Details for CVE-2026-53482
Vulnerability Analysis
The vulnerability is classified under [CWE-190] Integer Overflow or Wraparound. Dell Data Domain Operating System components fail to properly validate arithmetic operations on untrusted input received over the network. When an attacker supplies crafted values, integer arithmetic wraps beyond expected bounds, corrupting internal state and causing service disruption.
The vulnerability is exploitable without authentication or user interaction. The impact is limited to availability, with no confidentiality or integrity effect. EPSS data reports a score of 0.338% at the 25.848 percentile as of 2026-07-09.
Root Cause
The root cause is missing bounds validation in arithmetic operations that process attacker-controlled numeric fields. When the calculated value exceeds the maximum representable value for its data type, the result wraps around. This corrupted value is then used in downstream logic, resulting in service failure on the Data Domain appliance.
Attack Vector
Exploitation requires only network reachability to the affected appliance. An unauthenticated remote attacker sends crafted requests containing numeric parameters engineered to trigger the overflow. No credentials, user interaction, or prior foothold are required. Successful exploitation renders backup and recovery services unavailable, impacting business continuity operations that depend on the Data Domain platform.
No public proof-of-concept exploit is available at this time, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2026-53482
Indicators of Compromise
- Unexpected service restarts, crashes, or process termination on Dell PowerProtect Data Domain appliances
- Sudden loss of availability for backup, replication, or restore operations without a scheduled maintenance event
- Anomalous inbound traffic patterns to Data Domain management or data-plane network ports from untrusted sources
Detection Strategies
- Monitor Data Domain system logs and SNMP traps for abnormal process termination, watchdog resets, or kernel panic events
- Correlate network flow telemetry with appliance availability alerts to identify potential exploitation attempts targeting exposed services
- Deploy network-based intrusion detection signatures that inspect for malformed or oversized numeric fields in Data Domain protocol traffic
Monitoring Recommendations
- Aggregate Data Domain audit logs, syslog, and SNMP alerts in a centralized SIEM for real-time correlation and alerting
- Track service uptime and health metrics with baseline thresholds to detect denial of service conditions immediately
- Restrict management interface exposure and log all inbound connections to Data Domain appliances for forensic review
How to Mitigate CVE-2026-53482
Immediate Actions Required
- Apply the security updates published in Dell advisory DSA-2026-278 to all affected Dell PowerProtect Data Domain systems
- Inventory all Data Domain appliances and confirm version alignment with the fixed releases before returning them to production
- Restrict network access to Data Domain management and service ports to trusted administrative networks only
Patch Information
Dell has released fixed versions addressing CVE-2026-53482. Administrators should consult the Dell Security Update DSA-2026-278 for the complete list of remediated versions across the mainstream, LTS2026, LTS2025, and LTS2024 release trains. Apply the vendor-supplied update matching your current release train.
Workarounds
- Place Data Domain appliances behind network segmentation controls that block untrusted networks from reaching management and data services
- Enforce strict firewall access control lists limiting inbound connectivity to known backup infrastructure hosts
- Monitor appliance availability continuously and prepare failover or restore procedures in the event of a denial of service condition
# Example firewall restriction limiting Data Domain access to trusted subnets
iptables -A INPUT -p tcp -s 10.10.20.0/24 -d <data-domain-ip> -j ACCEPT
iptables -A INPUT -p tcp -d <data-domain-ip> -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
