CVE-2025-52606: HCL iControl Input Validation Vulnerability

CVE-2025-52606 Overview

CVE-2025-52606 affects HCL iControl with a weak input validation weakness. The product receives input expected to be of a certain type but fails to validate, or incorrectly validates, that the input matches the expected type. The flaw originates during implementation of an architectural security tactic. The vulnerability is associated with CWE-209, which covers information exposure through error messages. An authenticated network attacker can exploit the weakness to affect integrity without requiring user interaction.

Critical Impact

An authenticated attacker can send malformed input to HCL iControl over the network and trigger improper validation behavior, leading to limited integrity impact and potential information exposure through error responses.

Affected Products

• HCL iControl (specific affected versions not published in the CVE record)

Discovery Timeline

• 2026-06-04 - CVE-2025-52606 published to NVD
• 2026-06-04 - Last updated in NVD database

Technical Details for CVE-2025-52606

Vulnerability Analysis

The vulnerability stems from improper input validation in HCL iControl. The application accepts input that should conform to a specific type but does not enforce that constraint correctly. When unexpected input reaches downstream logic, the application may emit verbose error responses or take code paths that were not intended by the developers. Mapped to [CWE-209], this behavior can expose internal state, stack traces, or sensitive runtime details through error messages returned to the requester.

Exploitation requires network access and a low-privilege authenticated session. No user interaction is needed, and the attack complexity is low. The confidentiality and availability impacts are rated none, while integrity impact is rated low, indicating that an attacker can influence application behavior in limited ways.

Root Cause

The root cause is missing or incorrect type validation during input processing. The application trusts the caller to supply properly typed values and does not enforce strict checks before passing those values into business logic or error handlers. This design omission is described in the advisory as a flaw during implementation of an architectural security tactic.

Attack Vector

The attack vector is network based. An authenticated user submits crafted requests containing input of an unexpected type to an iControl endpoint. The server fails to reject the malformed input and instead processes it, returning error data or producing limited integrity changes. Refer to the HCL Software Knowledge Base Article for vendor technical details.

No verified proof-of-concept code is available. See the HCL Software Knowledge Base
for vendor-supplied technical details and request format specifics.

Detection Methods for CVE-2025-52606

Indicators of Compromise

• Unusual HTTP request patterns to HCL iControl endpoints containing parameters with unexpected data types, such as arrays where scalars are expected.
• Verbose error responses or stack traces returned by iControl to authenticated client sessions.
• Repeated authenticated requests from a single account that produce 4xx or 5xx error codes at elevated rates.

Detection Strategies

• Inspect application logs for parser exceptions, type-cast errors, or deserialization warnings tied to iControl API calls.
• Correlate authenticated session identifiers with anomalous request payload structures across short time windows.
• Deploy web application firewall rules that enforce strict schema validation in front of iControl interfaces.

Monitoring Recommendations

• Forward HCL iControl access and error logs to a centralized analytics platform for retention and query.
• Alert on spikes in error responses from iControl endpoints, particularly those returning detailed exception content.
• Monitor authenticated user accounts for sudden behavioral changes such as elevated request volume or atypical parameter usage.

How to Mitigate CVE-2025-52606

Immediate Actions Required

• Review the HCL Software Knowledge Base Article and apply vendor-provided fixes for affected iControl versions.
• Restrict network access to iControl management interfaces so they are reachable only from trusted administrative networks.
• Audit existing iControl user accounts and revoke unused or excess privileges to reduce the population of accounts that can authenticate.

Patch Information

HCL has published guidance through its support portal. Administrators should consult the vendor knowledge base article referenced above for the official patch release, fixed version numbers, and upgrade instructions specific to their deployment.

Workarounds

• Place a reverse proxy or WAF in front of iControl and enforce strict input schemas that reject unexpected types before requests reach the application.
• Disable detailed error messages in any administrator-configurable logging or response settings to limit information exposure.
• Enforce multi-factor authentication on all iControl accounts to raise the barrier for an attacker meeting the authentication precondition.

# Example WAF rule concept: reject non-string values in a parameter expected to be a string
# Adapt to your WAF vendor syntax
SecRule ARGS:username "!@rx ^[A-Za-z0-9_.-]{1,64}$" \
  "id:1052606,phase:2,deny,status:400,msg:'iControl input type validation failure'"