CVE-2026-35071: Dell PowerScale InsightIQ RCE Vulnerability

CVE-2026-35071 Overview

CVE-2026-35071 is an OS command injection vulnerability affecting Dell PowerScale InsightIQ, versions 6.0.0 through 6.2.0. The flaw stems from improper neutralization of special elements used in operating system commands [CWE-78]. A high-privileged attacker with local access to the InsightIQ appliance can inject crafted input into command construction routines. Successful exploitation results in arbitrary command execution with elevated privileges on the underlying host. Dell published the fix in advisory DSA-2026-208 on May 12, 2026.

Critical Impact

Local command execution with scope change, enabling compromise of confidentiality, integrity, and availability across the InsightIQ appliance.

Affected Products

• Dell PowerScale InsightIQ 6.0.0
• Dell PowerScale InsightIQ 6.1.0
• Dell PowerScale InsightIQ 6.2.0

Discovery Timeline

• 2026-05-12 - Dell releases security advisory DSA-2026-208
• 2026-05-12 - CVE-2026-35071 published to NVD
• 2026-05-12 - Last updated in NVD database

Technical Details for CVE-2026-35071

Vulnerability Analysis

Dell PowerScale InsightIQ is a performance monitoring and reporting tool for Isilon and PowerScale storage clusters. The product exposes administrative functions that construct shell commands using user-controlled values. The vulnerability arises when these routines fail to neutralize shell metacharacters such as ;, |, &, backticks, and $() before passing arguments to the operating system shell.

An authenticated attacker with high privileges and local access can supply crafted input containing shell metacharacters. The application concatenates the input into a command string and executes it through a shell interpreter. The injected payload runs in the context of the InsightIQ service account on the appliance.

The scope is marked as changed, meaning execution can impact resources beyond the vulnerable component's security authority. Attackers can leverage this primitive to pivot to operating system access, manipulate monitoring data, or stage further compromise of connected PowerScale clusters.

Root Cause

The root cause is improper neutralization of special elements in OS command construction [CWE-78]. Input destined for shell execution is not sanitized, escaped, or passed through a parameterized API such as execve with an argument array. Dell has not disclosed the specific vulnerable component or endpoint.

Attack Vector

Exploitation requires local access to the InsightIQ appliance and credentials with high privileges. No user interaction is needed. The attacker submits a payload to a vulnerable administrative function, which appends the input to a shell command and executes it. Refer to Dell Security Update DSA-2026-208 for product-specific details.

Detection Methods for CVE-2026-35071

Indicators of Compromise

• Unexpected child processes spawned by the InsightIQ service account, particularly shells such as /bin/sh, /bin/bash, or interpreters like python, perl, or nc.
• Outbound network connections from the InsightIQ appliance to untrusted hosts following administrative actions.
• New or modified files in writable directories owned by the InsightIQ service user, including /tmp and home directories.

Detection Strategies

• Monitor process execution telemetry on the InsightIQ host for shell metacharacters in command-line arguments invoked by the InsightIQ application stack.
• Alert on privileged administrative API calls followed within seconds by shell or scripting interpreter execution.
• Compare running configuration and binaries against a known-good baseline to detect tampering.

Monitoring Recommendations

• Forward appliance audit logs and authentication events to a centralized SIEM for correlation with administrator session activity.
• Track all high-privileged logins to InsightIQ and review command history for unusual administrative actions.
• Enable file integrity monitoring on system directories and InsightIQ configuration paths.

How to Mitigate CVE-2026-35071

Immediate Actions Required

• Apply the fixed version of Dell PowerScale InsightIQ as specified in DSA-2026-208.
• Restrict local and administrative access to the InsightIQ appliance to a minimal set of trusted operators.
• Rotate credentials for all accounts with high privileges on the appliance after patching.

Patch Information

Dell addressed CVE-2026-35071 in the security update published as DSA-2026-208 on May 12, 2026. The advisory covers multiple vulnerabilities in Dell PowerScale InsightIQ versions 6.0.0 through 6.2.0. Customers should consult the Dell advisory for the remediated version and upgrade instructions.

Workarounds

• Limit network reachability of the InsightIQ management interface to a dedicated administrative VLAN or jump host.
• Enforce multi-factor authentication for all administrative accounts on the appliance.
• Audit and remove unused high-privilege accounts to reduce the population capable of triggering the vulnerability until the patch is deployed.

# Verify the running InsightIQ version before and after patching
ssh admin@<insightiq-host> 'iiq_version'

# Restrict management access at the network layer (example)
iptables -A INPUT -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP