CVE Alert: CVE-2025-36202 – IBM – webMethods Integration

Risk verdict

High risk: the network-accessible format string vulnerability could lead to remote code execution by an authenticated, low-privilege user; patching should be treated as a priority.

Why this matters

If exploited, an attacker could run arbitrary commands on the hosting system, potentially taking control of the integration layer and accessing connected applications and data. WebMethods Integrations sit at the core of many enterprise workflows, so compromise can cascade to downstream systems and disrupt business processes.

Most likely attack path

• Attacker gains or possesses a valid account with execute permissions to the vulnerable webMethods service.
• They send crafted input over the network that triggers the format string flaw, enabling command execution without user interaction.
• With RCE and high impact on confidentiality, integrity, and availability, there is potential for lateral movement if trust boundaries and network segmentation are weak.

Who is most exposed

Enterprises running on-prem WebMethods Integration (10.15/11.1) or cloud-connected deployments, especially those exposed to external networks or integrated with critical IT assets, are at risk.

Detection ideas

• Unusual process spawning or system commands originating from the webMethods service.
• Repeated failed/successful authentication attempts from external sources targeting the service.
• Crash reports, stack traces, or abnormal error logs tied to input strings.
• Anomalous input patterns in integration endpoints, e.g., unusual long or crafted format-like payloads.
• Indicators on host-level or SIEM dashboards showing elevated privilege activity linked to the service.

Mitigation and prioritisation

• Apply IS_10.15_Core_Fix22+ or later and IS_11.1_Core_Fix6+ or later via IBM Update Manager.
• Implement change-management: schedule patching in a maintenance window; verify in QA before production.
• Enforce least privilege for accounts used to access the vulnerable services; restrict external access and implement network segmentation.
• Enable enhanced input validation and robust logging around format-string related inputs; monitor for related anomalies.
• If KEV true or EPSS ≥ 0.5, treat as priority 1. No KEV/EPSS data is provided here; confirm and adjust accordingly.