CVE-2025-61937: Aveva Process Optimization RCE Vulnerability

CVE-2025-61937 Overview

CVE-2025-61937 is a critical code injection vulnerability (CWE-94) affecting AVEVA Process Optimization. The vulnerability, if exploited, could allow an unauthenticated attacker to achieve remote code execution under OS system privileges of the taoimr service, potentially resulting in complete compromise of the model application server.

Critical Impact

This vulnerability enables unauthenticated remote code execution with elevated system privileges, potentially allowing complete takeover of affected AVEVA Process Optimization servers in industrial control system (ICS) environments.

Affected Products

• AVEVA Process Optimization (all versions prior to patch)
• Systems running the taoimr service component
• Industrial control system deployments utilizing AVEVA Process Optimization

Discovery Timeline

• January 16, 2026 - CVE-2025-61937 published to NVD
• January 22, 2026 - Last updated in NVD database

Technical Details for CVE-2025-61937

Vulnerability Analysis

This vulnerability represents a severe code injection flaw within the AVEVA Process Optimization platform, specifically targeting the taoimr service component. The vulnerability allows unauthenticated attackers to inject and execute arbitrary code on the target system. Due to the service running with elevated operating system privileges, successful exploitation grants attackers complete control over the affected model application server.

Industrial control systems running this software are particularly at risk, as compromise could affect critical operational technology (OT) environments. The network-accessible nature of this vulnerability means it can be exploited remotely without requiring any prior authentication or user interaction.

Root Cause

The root cause of CVE-2025-61937 is improper code generation control (CWE-94), where the taoimr service fails to properly validate and sanitize input before processing. This allows attackers to inject malicious code that gets executed within the context of the privileged service. The lack of authentication requirements on vulnerable endpoints compounds the severity of this flaw.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no authentication credentials or user interaction. An attacker can remotely send specially crafted requests to the taoimr service, injecting malicious code that executes with the service's elevated privileges. The exploitation path does not require any prior access to the target system, making it particularly dangerous for internet-facing or inadequately segmented ICS deployments.

The vulnerability mechanism involves the service's failure to properly sanitize input before code evaluation or execution. Attackers can craft payloads that bypass any existing input validation to inject commands or code that the service then executes. For detailed technical information, refer to the CISA ICS Advisory and the AVEVA Cyber Security Updates page.

Detection Methods for CVE-2025-61937

Indicators of Compromise

• Unusual network connections to the taoimr service from external or unauthorized sources
• Unexpected process spawning or child processes originating from the taoimr service
• Anomalous system commands or scripts executed under the service account context
• Suspicious log entries indicating malformed or injection-pattern requests to the service

Detection Strategies

• Implement network intrusion detection rules to identify exploitation attempts targeting the taoimr service
• Deploy endpoint detection and response (EDR) solutions like SentinelOne to monitor for suspicious process behavior and code injection patterns
• Configure application-level logging on AVEVA Process Optimization to capture detailed request information
• Utilize behavioral analysis to detect anomalous activity patterns from the service process

Monitoring Recommendations

• Monitor network traffic for unusual patterns to and from systems running AVEVA Process Optimization
• Enable comprehensive logging for the taoimr service and forward logs to a centralized SIEM
• Establish baseline behavior for the service and alert on deviations
• Implement file integrity monitoring on critical system files and service binaries

How to Mitigate CVE-2025-61937

Immediate Actions Required

• Apply the security patch from AVEVA immediately via the AVEVA Product Download portal
• Isolate affected systems from untrusted networks until patching is complete
• Implement network segmentation to restrict access to the taoimr service to authorized hosts only
• Review access logs for any signs of exploitation prior to patching

Patch Information

AVEVA has released a security update to address this vulnerability. Organizations should obtain the patch from the official AVEVA Software Support Portal. Refer to the AVEVA Cyber Security Updates page for the latest security bulletins and patching guidance. Additional technical details are available in CISA ICS Advisory ICSA-26-015-01.

Workarounds

• Restrict network access to the taoimr service using firewall rules to allow only trusted IP addresses
• Implement a web application firewall (WAF) or reverse proxy with strict input validation rules in front of the service
• Consider disabling the vulnerable service component if not operationally critical until patching is possible
• Deploy network segmentation to isolate ICS/OT systems from general enterprise networks

# Example firewall configuration to restrict access to taoimr service
# Adjust port numbers and trusted IPs according to your environment

# Allow only trusted management hosts
iptables -A INPUT -p tcp --dport <service_port> -s <trusted_ip_range> -j ACCEPT
# Deny all other access to the service port
iptables -A INPUT -p tcp --dport <service_port> -j DROP