CVE-2025-4675 Overview
CVE-2025-4675 is an Improper Check for Unusual or Exceptional Conditions vulnerability (CWE-754) affecting ABB WebPro SNMP Card PowerValue and ABB WebPro SNMP Card PowerValue UL devices. This vulnerability allows an attacker with adjacent network access to cause a denial of service condition on affected devices by sending specially crafted requests that exploit insufficient validation of unusual or exceptional input conditions.
The vulnerability stems from the device's failure to properly validate and handle exceptional conditions in network communications, which can be exploited to disrupt the availability of critical power management infrastructure.
Critical Impact
Adjacent network attackers can disrupt power management infrastructure by exploiting improper condition checking, potentially causing denial of service on affected ABB SNMP card devices without requiring authentication.
Affected Products
- ABB WebPro SNMP Card PowerValue through version 1.1.8.K
- ABB WebPro SNMP Card PowerValue UL through version 1.1.8.K
Discovery Timeline
- 2026-01-07 - CVE CVE-2025-4675 published to NVD
- 2026-01-08 - Last updated in NVD database
Technical Details for CVE-2025-4675
Vulnerability Analysis
This vulnerability is classified under CWE-754 (Improper Check for Unusual or Exceptional Conditions), which occurs when software fails to properly anticipate or handle exceptional conditions that rarely occur during normal operation. In the context of the ABB WebPro SNMP Card PowerValue devices, this manifests as inadequate validation of edge-case inputs or abnormal network conditions.
The vulnerability is exploitable from an adjacent network position, meaning an attacker must have access to the same network segment as the vulnerable device. No prior authentication or user interaction is required to exploit this vulnerability, making it particularly concerning for industrial environments where these SNMP cards are deployed for power management monitoring.
Successful exploitation results in high availability impact, causing denial of service conditions that can disrupt power monitoring and management capabilities. However, confidentiality and integrity are not directly affected by this vulnerability.
Root Cause
The root cause lies in the device firmware's insufficient handling of unusual or exceptional conditions during network communication processing. When the device receives input that falls outside normal operational parameters, it fails to properly validate and handle these edge cases, leading to unexpected behavior that can result in service disruption.
The affected SNMP card firmware through version 1.1.8.K does not adequately implement boundary checks and exception handling for unusual input conditions, allowing attackers to trigger denial of service states.
Attack Vector
The attack vector requires adjacent network access, meaning the attacker must be positioned on the same local network segment as the target device. This is a common scenario in industrial control system (ICS) and operational technology (OT) environments where SNMP-enabled devices are deployed for infrastructure monitoring.
An attacker on the adjacent network can send malformed or specially crafted requests to the vulnerable device. Due to the improper validation of exceptional conditions, these requests can cause the device to enter an unstable state, disrupting its normal operation and availability.
The vulnerability mechanism involves sending input that triggers unhandled exceptional conditions in the device's network processing logic. For detailed technical information about the exploitation mechanism and affected components, refer to the ABB Security Advisory.
Detection Methods for CVE-2025-4675
Indicators of Compromise
- Unexpected device restarts or unavailability of ABB WebPro SNMP Card PowerValue devices
- Anomalous SNMP traffic patterns originating from adjacent network segments
- Service interruptions in power management monitoring systems
- Log entries indicating failed or malformed SNMP requests
Detection Strategies
- Monitor network traffic for unusual SNMP request patterns targeting ABB WebPro SNMP Card devices
- Implement network-based anomaly detection for traffic on SNMP ports (UDP 161/162)
- Deploy intrusion detection rules to identify malformed packets destined for known vulnerable device IP addresses
- Establish baseline behavior for SNMP card communications and alert on deviations
Monitoring Recommendations
- Enable logging on network devices to capture traffic to and from ABB WebPro SNMP Card systems
- Configure SIEM rules to correlate SNMP device unavailability events with network traffic anomalies
- Implement health monitoring for SNMP card devices to detect availability impacts quickly
- Review network access logs for unauthorized devices attempting communication with vulnerable infrastructure
How to Mitigate CVE-2025-4675
Immediate Actions Required
- Review the ABB Security Advisory for official remediation guidance
- Implement network segmentation to restrict adjacent network access to vulnerable devices
- Limit access to SNMP card devices to only authorized management systems
- Monitor affected devices for signs of exploitation or service disruption
Patch Information
ABB has released security information regarding this vulnerability. Organizations should consult the official ABB Security Advisory for firmware update information and detailed remediation guidance. Ensure all ABB WebPro SNMP Card PowerValue and PowerValue UL devices running firmware version 1.1.8.K or earlier are prioritized for patching.
Workarounds
- Implement strict network access controls to limit which devices can communicate with vulnerable SNMP cards
- Deploy firewall rules to restrict SNMP traffic to authorized management stations only
- Consider placing vulnerable devices on isolated network segments with controlled access points
- Disable unnecessary network services on the SNMP card devices where possible
# Example network segmentation configuration
# Restrict SNMP access to authorized management VLAN only
# Firewall rule example (adjust for your environment):
iptables -A INPUT -p udp --dport 161 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p udp --dport 161 -j DROP
iptables -A INPUT -p udp --dport 162 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p udp --dport 162 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
