Indian Scout Bobber 2025 WCM CAN bus-off attack silently bypasses anti-theft shutdown
Summary
| CVE | CVE-2026-49316 |
|---|---|
| State | PUBLISHED |
| Assigner | ASRG |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-29 14:16:32 UTC |
| Updated | 2026-05-29 14:16:32 UTC |
| Description | Expected behavior violation in the in-vehicle network of the Indian Motorcycle Scout Bobber + Tech 2025 model year allows an adjacent-network attacker to bypass the motorcycle's anti-theft shutdown by forcing the Wireless Control Module (WCM) into the CAN bus-off state. Using a well-known CAN error-frame injection technique against a periodic WCM transmission, the attacker drives the WCM CAN controller's transmit error counter past the bus-off threshold, after which the WCM stops transmitting all messages, including the shutdown command. Peer ECUs do not interpret WCM silence as a security event and continue normal operation, allowing the motorcycle to be operated despite the immobilizer never having been unlocked. Specific protocol details have been withheld pending vendor remediation. |
Risk And Classification
Primary CVSS: v4.0 4.1 MEDIUM from [email protected]
CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-440 | CWE-693 | CWE-754 | CWE-440 CWE-440 Expected Behavior Violation | CWE-754 CWE-754 Improper Check for Unusual or Exceptional Conditions | CWE-693 CWE-693 Protection Mechanism Failure
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 4.1 | MEDIUM | CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 4.1 | MEDIUM | CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| 3.1 | [email protected] | Secondary | 4.6 | MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 4.6 | MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v4.0 Breakdown
CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Indian Motorcycle Polaris Inc. | Scout Bobber Tech | affected 2025 model-year | OEM Motorcycle |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| cwe.mitre.org/data/definitions/440.html | [email protected] | cwe.mitre.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Scott Sheahan, Rustic Security LLC (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2025-03-26T00:00:00.000Z | Reported to Indian Motorcycle by Rustic Security LLC (responsible disclosure) |
Solutions
CNA: Treat absence of the WCM heartbeat as a security event in peer ECUs — command shutdown if the WCM's periodic message is missing beyond a bounded interval. Authenticate the heartbeat with AUTOSAR SecOC or equivalent to prevent post-silence spoofing. Auto-recover the WCM from bus-off and log the event.