Indian Scout Bobber 2025 WCM-to-ECM weak authentication_CVE-2026-49323

4.3 / 10

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Description

Weak authentication between the Wireless Control Module (WCM) and the Engine Control Module (ECM) of the Indian Motorcycle Scout Bobber + Tech 2025 model year allows an adjacent-network attacker with read access to the in-vehicle network to recover the per-vehicle ECM immobilizer secret by passively observing a single seed/key exchange. The WCM derives its response using a reversible, non-cryptographic operation rather than a cryptographic challenge-response, so the persistent immobilizer secret can be reconstructed from one captured exchange. With this secret the attacker can authenticate to the ECM independently of the WCM and start the engine, defeating the immobilizer. Specific protocol details have been withheld pending vendor remediation.

Basic Information

ID CVE-2026-49323

Source ASRG

Published May 29, 2026 at 12:31

Modified May 29, 2026 at 13:31

Affected Product

Vendor Indian Motorcycle (Polaris Inc.)

Product Scout Bobber + Tech

Version 2025

Affected Versions Indian Motorcycle (Polaris Inc.) Scout Bobber + Tech 2025

CWE Classification

CWE-1390 CWE-327 CWE-798

References

cwe.mitre.org /data/definitions/1390.html

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