CVE-2025-2862 Overview
CVE-2025-2862 affects the Arteche SaTECH Bay Control Unit (BCU) running firmware version 2.1.3. The device stores user credentials using weak password encryption. An attacker with access to the device's underlying system or web interface can recover stored credentials because the encryption mechanisms protecting them are insufficient. The flaw maps to [CWE-261: Weak Encoding for Password] and impacts confidentiality of authentication material used to manage the substation automation device.
Critical Impact
An adjacent-network attacker with low privileges can recover stored credentials from the SaTECH BCU, enabling lateral movement and unauthorized control of substation equipment.
Affected Products
- Arteche SaTECH BCU firmware version 2.1.3
- Arteche SaTECH BCU hardware (all hardware revisions running affected firmware)
- Substation automation deployments using the affected Bay Control Unit
Discovery Timeline
- 2025-03-28 - CVE-2025-2862 published to NVD
- 2025-10-15 - Last updated in NVD database
Technical Details for CVE-2025-2862
Vulnerability Analysis
The SaTECH BCU is a Bay Control Unit deployed in electrical substations for protection, control, and monitoring functions. Firmware version 2.1.3 stores authentication credentials using an encoding or encryption scheme that does not meet modern cryptographic standards. The vulnerability allows credential recovery rather than direct code execution or privilege escalation through memory corruption.
The weakness is exploitable by an attacker who already has access to the device's file system or to authenticated portions of the web interface where stored credentials are retrievable. Because the protection mechanism is weak, reversing the stored value back to plaintext is feasible without specialized hardware or extensive compute resources.
Recovered credentials enable an attacker to authenticate as legitimate operators and issue control commands to substation equipment. In operational technology (OT) environments, this can translate into unauthorized switching operations, disabled protections, or persistent footholds within the industrial control network.
Root Cause
The root cause is the use of a weak password storage scheme [CWE-261]. Rather than applying a salted, computationally expensive key derivation function such as PBKDF2, bcrypt, scrypt, or Argon2, the firmware relies on encoding or reversible encryption that an attacker can defeat once the stored ciphertext or encoded blob is obtained.
Attack Vector
The attack vector is adjacent network with low privileges required and no user interaction. An attacker who reaches the BCU through a substation LAN, engineering workstation, or maintenance interface and obtains low-level access can extract the stored credential material. The attacker then reverses the weak encoding offline to recover plaintext passwords. No verified public proof-of-concept code is available. Refer to the INCIBE Security Notice for vendor-coordinated technical details.
Detection Methods for CVE-2025-2862
Indicators of Compromise
- Unexpected authentication sessions on the SaTECH BCU web interface originating from substation workstations or unknown IP addresses.
- Access to configuration backup files, password stores, or /etc-equivalent paths on the device outside of scheduled maintenance windows.
- Reuse of BCU operator credentials on other substation assets, suggesting offline credential recovery has occurred.
Detection Strategies
- Monitor BCU authentication logs for successful logins outside normal operator schedules or from unauthorized network segments.
- Inspect network captures for HTTP/HTTPS requests targeting credential storage endpoints or firmware configuration export functions.
- Correlate engineering workstation activity with BCU access events to identify anomalous credential retrieval patterns.
Monitoring Recommendations
- Forward BCU syslog and web server logs to a centralized OT-aware SIEM for retention and correlation.
- Baseline normal management traffic to the BCU and alert on deviations such as new source hosts or unusual file downloads.
- Track use of shared or default operator accounts and require multi-factor approval for sensitive control commands where supported.
How to Mitigate CVE-2025-2862
Immediate Actions Required
- Restrict network access to the SaTECH BCU management interfaces to a dedicated, ACL-controlled engineering VLAN.
- Rotate all credentials configured on affected BCUs and avoid reusing those passwords on other substation assets.
- Contact Arteche support to confirm availability of updated firmware that addresses the weak credential storage issue.
Patch Information
No vendor patch URL is listed in the NVD record at publication. Asset owners should consult the INCIBE Security Notice and contact Arteche directly for firmware updates beyond version 2.1.3 that remediate CVE-2025-2862.
Workarounds
- Place the BCU behind a firewall that permits management traffic only from trusted engineering hosts and jump servers.
- Disable unused management services and protocols on the BCU to reduce the avenues by which stored credentials can be reached.
- Enforce strict physical and logical access controls on substation networks so that adjacent-network prerequisites for exploitation cannot be met.
# Example firewall restriction limiting BCU management access to a single engineering host
iptables -A FORWARD -s 10.10.20.5/32 -d 10.20.30.10/32 -p tcp --dport 443 -j ACCEPT
iptables -A FORWARD -d 10.20.30.10/32 -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
