CVE-2025-36202 Overview
CVE-2025-36202 is a format string vulnerability affecting IBM webMethods Integration versions 10.15 and 11.1. The flaw allows an authenticated user with permission to execute services to run arbitrary commands on the host system. The root cause is improper validation of format string arguments passed from an external source, classified under [CWE-134].
Successful exploitation grants attackers full compromise of confidentiality, integrity, and availability on the affected integration server. Because webMethods Integration handles enterprise data flows between business systems, exploitation can pivot into connected applications and downstream services.
Critical Impact
An authenticated attacker can execute arbitrary commands on the underlying system, leading to full host compromise and lateral movement across integrated enterprise applications.
Affected Products
- IBM webMethods Integration 10.15
- IBM webMethods Integration 11.1
- Deployments exposing service execution privileges to lower-trust users
Discovery Timeline
- 2025-09-22 - CVE-2025-36202 published to NVD
- 2025-10-03 - Last updated in NVD database
Technical Details for CVE-2025-36202
Vulnerability Analysis
The vulnerability is a format string flaw in IBM webMethods Integration. When the application passes an externally supplied argument into a function expecting a format specifier, attacker-controlled format tokens are interpreted instead of treated as literal data. This behavior enables memory disclosure, memory corruption, and in this case command execution on the underlying operating system.
The attack requires network access to the webMethods Integration endpoint and a valid account with execute privileges on Services. No user interaction is required to trigger the flaw once an authenticated session is established. The scope remains unchanged, but full impact on confidentiality, integrity, and availability is achieved on the host.
Root Cause
The defect stems from passing untrusted input directly into a function that interprets format string tokens such as %s, %x, or %n. IBM webMethods Integration fails to sanitize or restrict these specifiers before forwarding the data to the formatting routine. As a result, attacker input is parsed as a format string template rather than as data, enabling arbitrary read, write, or command execution paths depending on how the formatted output is later consumed.
Attack Vector
An authenticated attacker submits a crafted payload containing format specifiers through a Service that accepts external input. The vulnerable code path forwards the payload into the format-aware function without escaping. The integration server then executes operating system commands derived from the manipulated format processing, running with the privileges of the webMethods Integration process.
No public proof-of-concept code is currently available. Refer to the IBM Support Page for vendor technical details and fixed-version information.
Detection Methods for CVE-2025-36202
Indicators of Compromise
- Service invocations containing unusual format specifier sequences such as %s, %n, or %x in input parameters
- Unexpected child processes spawned by the webMethods Integration server process
- Outbound network connections from the integration host to unknown destinations following service execution
- New or modified files in directories writable by the webMethods service account
Detection Strategies
- Inspect webMethods audit logs for service invocations with anomalous string patterns containing percent-encoded format tokens
- Monitor for process lineage where the webMethods Java process spawns shells, cmd.exe, bash, or scripting interpreters
- Correlate authentication events for accounts with Service execute permissions against unusual invocation patterns or off-hours activity
Monitoring Recommendations
- Enable verbose service execution logging and forward events to a centralized SIEM for correlation
- Baseline normal Service invocation parameters and alert on deviations involving format specifier characters
- Track privileged webMethods accounts for unexpected geographic or temporal access patterns
How to Mitigate CVE-2025-36202
Immediate Actions Required
- Apply the IBM-supplied fix referenced in the IBM Support Page for webMethods Integration 10.15 and 11.1
- Audit accounts with Service execute privileges and revoke access from users who do not require it
- Rotate credentials for the webMethods service account and any integrated system accounts if compromise is suspected
- Restrict network access to webMethods Integration endpoints using firewall rules and segmentation
Patch Information
IBM has published remediation guidance on the IBM Support Page. Administrators should review the advisory for the specific fix pack or interim fix applicable to versions 10.15 and 11.1 and apply it during the next maintenance window.
Workarounds
- Limit Service execute permissions to a minimal set of trusted administrative accounts until patching is complete
- Place webMethods Integration servers behind a reverse proxy or web application firewall that filters input containing repeated format specifier characters
- Apply network segmentation to isolate webMethods Integration from internet-facing zones and reduce blast radius
# Configuration example: restrict access to webMethods Integration management port
# Replace 10.0.0.0/24 with your authorized administrative subnet
iptables -A INPUT -p tcp --dport 5555 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 5555 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
