CVE-2026-49323
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
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 uses a reversible, non-cryptographic operation instead of a cryptographic challenge-response, enabling reconstruction of the persistent immobilizer secret from one captured exchange.
Risk Assessment
An attacker can authenticate to the ECM independently of the WCM and start the engine, defeating the immobilizer, posing a risk of vehicle theft.
Recommendation
Implement cryptographic challenge-response authentication between WCM and ECM and enforce a firmware update from the vendor.
Original NVD description (English source)
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.