CVE-2026-71171: Dell Cloud Disaster Recovery RCE Vulnerability

CVE-2026-71171 Overview

CVE-2026-71171 is an OS Command Injection vulnerability [CWE-78] affecting Dell Cloud Disaster Recovery versions 20.2 and prior. The flaw resides in the REST API, where improper neutralization of special elements allows shell metacharacters to be interpreted by the underlying operating system. An authenticated attacker with high privileges and network access can inject arbitrary operating system commands. Successful exploitation leads to remote code execution on the host running the Cloud Disaster Recovery service.

Critical Impact
Authenticated remote attackers can execute arbitrary OS commands through the REST API, compromising the confidentiality, integrity, and availability of Cloud Disaster Recovery deployments.

Affected Products

Dell Cloud Disaster Recovery version 20.2
Dell Cloud Disaster Recovery versions prior to 20.2
REST API component of Dell Cloud Disaster Recovery

Discovery Timeline

2026-08-26 - CVE-2026-71171 published to the National Vulnerability Database
2026-08-26 - Last updated in NVD database

Technical Details for CVE-2026-71171

Vulnerability Analysis

The vulnerability exists in the REST API of Dell Cloud Disaster Recovery. User-controlled input reaches an operating system command interpreter without adequate sanitization or neutralization of shell metacharacters. Because the API accepts requests over the network, an attacker holding privileged API credentials can craft payloads containing characters such as ;, |, &, or backticks to append additional commands to the intended invocation.

Exploitation yields code execution in the security context of the Cloud Disaster Recovery service account. Given the role of Cloud Disaster Recovery in orchestrating backup and recovery workflows across cloud environments, compromise of this component can cascade into loss of backup integrity and exposure of cloud credentials stored by the application.

Root Cause

The root cause is improper neutralization of special elements used in an OS command [CWE-78]. The REST API passes input to a shell or command execution function without sufficient input validation, allow-listing, or use of parameterized process invocation. Any request parameter that flows into the command construction path becomes a potential injection point.

Attack Vector

The attack is remote and requires authentication with high privileges. No user interaction is required. An attacker with valid administrative or high-privilege API credentials sends a crafted HTTP request to a vulnerable REST endpoint. Command separators embedded in parameter values are interpreted by the operating system shell, resulting in execution of attacker-supplied commands. Refer to the Dell Security Update Advisory for technical details on affected endpoints.

Detection Methods for CVE-2026-71171

Indicators of Compromise

REST API requests containing shell metacharacters such as ;, |, &, $(), or backticks in parameter values
Unexpected child processes spawned by the Cloud Disaster Recovery service (for example, sh, bash, cmd.exe, powershell.exe)
Outbound network connections initiated by the Cloud Disaster Recovery process to unfamiliar destinations
New scheduled tasks, cron jobs, or persistence artifacts created on Cloud Disaster Recovery hosts

Detection Strategies

Inspect REST API access logs for request bodies and query parameters containing command injection payloads
Correlate API authentication events with subsequent process creation events on Cloud Disaster Recovery hosts
Baseline expected process lineage for the Cloud Disaster Recovery service and alert on deviations

Monitoring Recommendations

Forward Cloud Disaster Recovery application logs and host process telemetry to a centralized analytics platform
Alert on high-privileged API session activity outside of change windows
Monitor for privilege escalation attempts and lateral movement originating from the Cloud Disaster Recovery host

How to Mitigate CVE-2026-71171

Immediate Actions Required

Apply the patched version of Dell Cloud Disaster Recovery as described in the Dell Security Update Advisory DSA-2026-353
Rotate credentials for all high-privilege Cloud Disaster Recovery API accounts
Audit recent REST API activity for signs of exploitation prior to patching

Patch Information

Dell has published remediation guidance in advisory DSA-2026-353. Administrators should upgrade Cloud Disaster Recovery to a version later than 20.2 as instructed in the vendor advisory. Consult the Dell Security Update Advisory for fixed release details.

Workarounds

Restrict network access to the Cloud Disaster Recovery REST API to trusted management networks only
Enforce least privilege on API accounts and remove unused administrative credentials
Require multi-factor authentication for all administrative access to the management interface
Deploy a web application firewall rule set that blocks shell metacharacters in REST API parameters

bash

# Example network restriction using iptables to limit REST API access
iptables -A INPUT -p tcp --dport 443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP