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Cloud Disaster Recovery CVE-2026-71171

| EUVDEUVD-2026-66658 HIGH
OS Command Injection (CWE-78)
2026-08-26 dell GHSA-hg7r-hh9h-grmm
7.2
CVSS 3.1 · Vendor: dell
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain or compromise high-privilege API credentials
  2. Delivery
    Craft malicious REST API request with injected shell metacharacters
  3. Exploit
    Submit request to network-exposed API endpoint
  4. Execution
    Server executes injected OS commands
  5. Impact
    Attain full command execution on DR appliance

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization OS command sanitization, avoid shell exec
MITRE ATT&CK

2 techniques across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires remote network access to the Dell Cloud Disaster Recovery REST API endpoint and valid high-privileged (administrative) credentials, as confirmed by the CVSS vector PR:H. The attack complexity is low (AC:L) with no user interaction required (UI:N), meaning once credentials are in hand the injection is straightforward. Limiting factors: the PR:H requirement means unauthenticated exploitation is not possible under this vulnerability alone - an attacker must first compromise or possess admin-level API credentials. Versions 20.2 and prior are confirmed affected; systems already patched per DSA-2026-353 are not vulnerable.

Impact

The CVSS 7.2 score with vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H reflects a balanced picture: while the attack is network-accessible with low complexity and full CIA impact, the PR:H requirement is the critical limiting signal - an attacker must first obtain high-privileged (administrative) credentials to exploit this. This is not a zero-authentication exposure. No EPSS data was provided in the source intelligence, so probabilistic exploitation likelihood cannot be quantified. No CISA KEV listing and no reported public exploit code further reduce near-term urgency. Real-world risk is elevated primarily for environments where admin credentials may be compromised, weak, shared, or exposed - such as misconfigured VPN-exposed management interfaces. The S:U (scope unchanged) metric indicates impact is confined to the DR appliance itself, limiting lateral risk to wider infrastructure unless the appliance has privileged reach into backup targets.

Exploit ScenarioDerived

An attacker who has obtained or compromised high-privileged API credentials - through credential stuffing, phishing an admin, or reuse of credentials from another breach - sends a crafted REST API request containing shell metacharacters in a vulnerable parameter. The application passes the unsanitized input to an OS command call, causing the injected commands to execute with the privileges of the application process on the underlying server, potentially granting full control of the disaster recovery appliance.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 1.0% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 26, 2026

OS command injection in Dell Cloud Disaster Recovery versions 20.2 and prior allows a high-privileged remote attacker to execute arbitrary operating system commands via the product's REST API, resulting in full system compromise. The vulnerability is rooted in insufficient sanitization of special characters within API inputs (CWE-78) and is reachable over the network without user interaction. No public exploit code or active exploitation has been identified at time of analysis; Dell has released a security advisory (DSA-2026-353) addressing the issue.

RemediationAI

Apply the vendor-released patch per Dell advisory DSA-2026-353 at https://www.dell.com/support/kbdoc/en-us/000500898/dsa-2026-353-security-update-for-cloud-disaster-recovery-vulnerabilities - the exact fixed version should be confirmed from that advisory as no specific version number was present in the available intelligence. As a compensating control, restrict network access to the REST API management interface using firewall rules or network ACLs to permit only trusted administrative IP ranges, reducing the exploitable network surface while patching is operationalized. Additionally, enforce strong, unique credentials for all high-privileged REST API accounts and audit active admin sessions to detect unauthorized access. Restricting REST API exposure via VPN-only access is a high-value workaround with minimal operational trade-off for most DR deployments.

Affected VersionsENISA

Cloud Disaster Recovery 0 <CDR 20.3

Affected Packages

euvd cloud_disaster_recovery_0_cdr no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Dell Cloud Disaster Recovery is an enterprise backup and disaster recovery appliance. The affected component is its REST API layer, which fails to neutralize special shell metacharacters (CWE-78: OS Command Injection) before passing user-supplied input to underlying OS command execution contexts. CPE cpe:2.3:a:dell:cloud_disaster_recovery:*:*:*:*:*:*:*:* confirms all versions through 20.2 are affected. The REST API being exposed over the network (AV:N per CVSS vector) means exploitation does not require local system access, though the PR:H requirement substantially constrains who can trigger the flaw.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (dell) PRIMARY 7.2 HIGH
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 7.2 HIGH

Network-accessible REST API with high-privilege requirement; full CIA impact on the appliance; no scope change beyond the vulnerable system.

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (dell).

CVSS VectorVendor: dell

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Dell Cloud Disaster Recovery, versions 20.2 and prior, contain an Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in the REST API. A high privileged attacker with remote access could potentially exploit this vulnerability, leading to Remote execution.

Executive ViewAI

Why It Matters

Dell Cloud Disaster Recovery versions 20.2 and earlier contain a remote command injection vulnerability (CVE-2026-71171) that permits authenticated attackers to execute arbitrary operating system commands and fully compromise the disaster recovery infrastructure. While no public exploit has been identified at time of analysis, organizations relying on this product face an extended exposure window, as no vendor-released patch is currently available, creating material risk to disaster recovery capability.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Implement network segmentation limiting REST API access to trusted administrative networks only; deploy enhanced logging and real-time monitoring of API requests for anomalous activity; restrict product access via firewall rules based on source IP address; enforce multi-factor authentication for all administrative access to the product.

Threat Intelligence Overview

EPSS Score
1.0%
Top 39% exploitable
Prevalence
Low
specialized enterprise DR appliance, limited deployment footprint
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 1.0%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

37
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

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