CVE-2026-67102 Overview
CVE-2026-67102 is a Broken Access Control vulnerability [CWE-285] in HCL BigFix Service Management. The flaw allows a low-privileged authenticated user to reach administrative screens and functions intended for higher-privileged roles. Successful exploitation compromises the confidentiality and integrity of the service management platform. HCL Software has published guidance in a HCL Software Knowledge Base Article.
Critical Impact
An authenticated low-privileged account can access administrative functionality, enabling unauthorized configuration changes and exposure of sensitive service management data.
Affected Products
- HCL BigFix Service Management
Discovery Timeline
- 2026-09-18 - CVE-2026-67102 published to NVD
- 2026-09-18 - Last updated in NVD database
Technical Details for CVE-2026-67102
Vulnerability Analysis
The vulnerability arises from missing or improper authorization checks in HCL BigFix Service Management. Administrative screens and functions do not verify the caller's role before granting access. Any authenticated user with low privileges can invoke these functions by requesting the corresponding endpoints directly. The impact covers both confidentiality and integrity, as administrative operations expose sensitive data and permit configuration changes.
Root Cause
The root cause is improper authorization [CWE-285]. The application relies on interface-layer controls, such as hiding menu options, rather than enforcing server-side role verification on each administrative action. When a low-privileged user constructs a valid request to a restricted URL or API, the backend processes it without checking the user's assigned role.
Attack Vector
The attack is network-based and requires authentication with a low-privileged account. An attacker who obtains any valid session, including through credential compromise or a legitimate low-tier account, can send crafted HTTP requests to administrative endpoints. No user interaction is required, and exploitation complexity is low. Consult the HCL Software Knowledge Base Article for technical specifics.
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Stop Identity AttacksDetection Methods for CVE-2026-67102
Indicators of Compromise
- Requests from non-administrative user sessions targeting administrative URLs or API endpoints in BigFix Service Management.
- Unexpected configuration changes, role modifications, or privileged actions performed by accounts without administrator entitlements.
- Audit log entries showing successful administrative operations attributed to low-privileged user IDs.
Detection Strategies
- Correlate application audit logs with identity role assignments to flag any administrative action executed by a non-admin principal.
- Deploy web application firewall rules that restrict administrative URL paths to sessions bound to administrator roles.
- Baseline normal user behavior and alert on privilege-tier anomalies, such as help-desk accounts issuing configuration or user-management calls.
Monitoring Recommendations
- Enable verbose HTTP access logging on the BigFix Service Management application tier and forward logs to a centralized SIEM.
- Monitor authentication events for reused or shared low-privileged accounts that suddenly access administrative functionality.
- Track EPSS scoring changes and vendor advisory updates for CVE-2026-67102 to reprioritize response as exploit likelihood shifts.
How to Mitigate CVE-2026-67102
Immediate Actions Required
- Apply the remediation guidance provided by HCL Software in the referenced knowledge base article as soon as it is validated in a test environment.
- Audit all BigFix Service Management user accounts and remove unnecessary privileges or dormant low-privileged accounts.
- Rotate credentials for accounts that may have been used to access administrative functionality without authorization.
Patch Information
HCL Software has published remediation guidance in the HCL Software Knowledge Base Article KB0133782. Administrators should follow the vendor instructions to obtain the fixed release or configuration update for HCL BigFix Service Management.
Workarounds
- Restrict network access to the BigFix Service Management administrative interface using firewall rules or reverse-proxy access control lists.
- Enforce multi-factor authentication on all BigFix Service Management accounts to reduce the risk of credential-based exploitation.
- Review and tighten role-based access control assignments so that only vetted administrators hold accounts capable of triggering the exposed functions.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
