Vulnerability · Published May 29, 2026 · Assigned by ASRG
CVE-2026-49323Indian Scout Bobber 2025 WCM-to-ECM weak authentication
Medium 4.3
In plain English
A medium-severity broken cryptography in Scout Bobber + Tech from Indian Motorcycle. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Indian Motorcycle | Scout Bobber + Tech | 2025 |
Weakness: CWE-1390, CWE-327, CWE-798 · Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N