Summary
Successful exploitation of this vulnerability could allow an attacker to enumerate the functionality of each component associated with the PLC, reconfigure, rename, delete, perform file transfers, and make remote procedure calls.
The following versions of Contemporary Controls BASC 20T are affected:
- BASControl20 3.1 (CVE-2025-13926)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 9.8 | Contemporary Controls Sedona Alliance | Contemporary Controls BASC 20T | Reliance on Untrusted Inputs in a Security Decision |
Background
- Critical Infrastructure Sectors: Commercial Facilities, Critical Manufacturing, Energy
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: United States
Vulnerabilities
CVE-2025-13926
An attacker could use data obtained by sniffing the network traffic to forge packets in order to make arbitrary requests to Contemporary Controls BASC 20T.
Affected Products
Contemporary Controls BASC 20T
Contemporary Controls Sedona Alliance
Contemporary Controls Sedona Alliance BASControl20: 3.1
known_affected
Remediations
Mitigation
According to Contemporary Controls, the BASC-20T is an obsolete product. It is recommended that users of the affected product contact Contemporary Controls for additional information.
https://www.ccontrols.com/support/contacttech.htm
Relevant CWE: CWE-807 Reliance on Untrusted Inputs in a Security Decision
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Acknowledgments
- Joseph Fields of Naval Information Warfare Center Pacific reported this vulnerability to CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When remote access is required, use more secure methods, such as virtual private networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted
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