Acrisure KARR BT and DR-100
All CISA Advisories, CISA, August 4, 2026
Summary
Successful exploitation of this vulnerability could allow an attacker to perform unauthorized vehicle control operations.
The following versions of Acrisure KARR BT and DR-100 are affected:
- KARR BT firmware <July_20_2026
- DR-100 firmware <July_20_2026
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 8.1 | Acrisure | Acrisure KARR BT and DR-100 | Use of Hard-coded Cryptographic Key |
Background
- Critical Infrastructure Sectors: Transportation Systems
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: United States
Vulnerabilities
CVE-2026-18411
The KARR Security System and SWDS dealer-installed automotive anti-theft systems use a shared Bluetooth authentication key across affected devices. An attacker within Bluetooth range can leverage this weakness to issue unauthorized commands to the vehicle, potentially allowing unauthorized access to vehicle functions, including door unlocking and engine immobilization.
Affected Products
Acrisure KARR BT and DR-100
Acrisure
Acrisure KARR BT firmware: <July_20_2026, Acrisure DR-100 firmware: <July_20_2026
known_affected
Remediations
Vendor fix
Acrisure Protection Group released a firmware update on July 20, 2026, to address this vulnerability. They recommend that affected users should follow the directions found here: https://www.karrsecurity.com/karr-security-firmware-update-instructions.
https://www.karrsecurity.com/karr-security-firmware-update-instructions
Relevant CWE: CWE-321 Use of Hard-coded Cryptographic Key
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 8.1 | HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| 4.0 | 7.2 | HIGH | CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N |
Acknowledgments
- Aaron Schulman, Jerry Yu, Yibo Wei, Sumanth Rao, Mohak Vaswani, Jefferson Chien, Christian Dameff, Nishant Bhaskar of UC San Diego team 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 Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
Do not click web links or open attachments in unsolicited email messages.
Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
Revision History
- Initial Release Date: 2026-08-04
| Date | Revision | Summary |
|---|---|---|
| 2026-08-04 | 1 | Initial Publication |
