Acrisure KARR BT and DR-100

August 4, 2026·Source: CISA

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TL;DR

View CSAF 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 Expand All + 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. View CVE Details Affected Products Acrisure KARR BT and DR-100 Vendor: Acrisure Product Version: Acrisure KARR BT firmware: <July_20_2026, Acrisure DR-100 firmware: <July_20_2026 Product Status: 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 Us

What Happened

Acrisure KARR BT and DR-100, reported by CISA.

v3 8.1 Acrisure Acrisure KARR BT and DR-100 Use of Hard-coded Cryptographic Key

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

For the full technical details, see the original report.

Why It Matters for Businesses

This development could affect organizations that rely on the impacted technologies or services. Unpatched systems, misconfigured infrastructure, or lack of monitoring can leave businesses exposed to exploitation, data breaches, and regulatory penalties.

How to Check Your Exposure

Run a free scan on NEL Professional's Cyber Risk Scanner to check whether your domain is affected. The scan covers SSL/TLS, security headers, DNS configuration, email authentication, and more across 16 modules.

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Mitigation Steps

Patch immediately, Apply vendor patches or updates as soon as they are available.
Review configurations, Check firewall rules, access controls, and security headers.
Monitor logs, Watch for indicators of compromise (IOCs) related to this threat.
Update security policies, Ensure incident response plans cover this type of threat.
Run a security scan, Use automated tools to verify your exposure.

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