CVE-2026-75792 Overview
CVE-2026-75792 is an authorization bypass vulnerability in IBM Sterling Secure Proxy versions 6.2.0.0 through 6.2.1.2. The flaw allows a remote authenticated attacker to view administrative user interface components that should be restricted based on user role. The root cause is client-side authorization enforcement, categorized as Improper Authorization [CWE-285]. Exploitation requires valid credentials on the target instance but no user interaction. IBM published a security advisory addressing the issue.
Critical Impact
Authenticated users can access administrative UI components intended for higher-privileged roles, exposing configuration and management information.
Affected Products
- IBM Sterling Secure Proxy 6.2.0.0
- IBM Sterling Secure Proxy 6.2.1.x through 6.2.1.2
- Deployments exposing the administrative web interface to authenticated users
Discovery Timeline
- 2026-09-14 - CVE-2026-75792 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-75792
Vulnerability Analysis
IBM Sterling Secure Proxy acts as a demilitarized zone (DMZ) reverse proxy for managed file transfer traffic. Its administrative interface exposes configuration and monitoring components that should be gated by server-side role checks. In affected versions, authorization decisions for certain administrative UI components rely on client-side logic rather than authoritative server-side enforcement. An authenticated user with a lower-privileged role can manipulate the client to render, or directly request, administrative components that should be hidden. The exposure is limited to confidentiality of interface elements; integrity and availability are not directly affected according to the published CVSS vector.
Root Cause
The vulnerability is a classic Improper Authorization pattern [CWE-285]. Access decisions for administrative UI elements are made in code executed on the client, such as JavaScript that toggles component visibility based on role attributes returned from the server. Because the backend does not re-validate authorization when the components or their supporting endpoints are accessed, an authenticated attacker can bypass the intended restriction by altering client state or issuing crafted requests.
Attack Vector
Exploitation requires network access to the administrative interface and valid credentials for any authenticated role. The attacker uses a browser developer console, an intercepting proxy, or direct HTTP requests to enumerate and load administrative components. No social engineering or user interaction is required. See the IBM Security Advisory for vendor-specific technical details and fixed versions.
Detection Methods for CVE-2026-75792
Indicators of Compromise
- Authenticated sessions from non-administrative accounts issuing requests to administrative UI paths or backend endpoints.
- Unusual HTTP request patterns from a single user session enumerating admin components in rapid succession.
- Browser sessions accessing admin resources without a prior navigation from a legitimate admin landing page (missing or spoofed Referer).
Detection Strategies
- Review Sterling Secure Proxy access logs for requests to administrative resources originating from user accounts that do not hold administrative roles.
- Correlate authentication events with subsequent URL access patterns to flag privilege boundary crossings.
- Deploy web application firewall (WAF) rules that inspect the requested path against the authenticated user's role attribute.
Monitoring Recommendations
- Forward Sterling Secure Proxy audit and web-tier logs to a centralized SIEM for role-versus-resource correlation.
- Alert on repeated HTTP 200 responses to administrative endpoints from non-admin session identifiers.
- Track configuration read operations by role and baseline normal access patterns to detect deviations.
How to Mitigate CVE-2026-75792
Immediate Actions Required
- Apply the fix referenced in the IBM Security Advisory for Sterling Secure Proxy 6.2.
- Inventory all Sterling Secure Proxy instances running 6.2.0.0 through 6.2.1.2 and prioritize internet-facing deployments.
- Review administrative role assignments and remove unnecessary accounts from the platform.
Patch Information
IBM has released an official fix documented in the vendor advisory at IBM Support Node 7287369. Administrators should upgrade to the fixed release identified by IBM for the 6.2 branch and verify the version after installation.
Workarounds
- Restrict network access to the Sterling Secure Proxy administrative interface using firewall rules or a jump host until the patch is applied.
- Enforce least privilege by auditing user roles and revoking accounts that do not require access to the management console.
- Enable multi-factor authentication on administrative and operator accounts to raise the cost of credential-based access.
# Example: restrict access to the SSP admin interface to a management subnet
iptables -A INPUT -p tcp --dport 8443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
