CVE-2026-49322 Overview
CVE-2026-49322 affects the Wireless Control Module (WCM) of the Indian Motorcycle Scout Bobber + Tech 2025 model year. The vulnerability stems from weak authentication [CWE-294] in the PIN exchange between the WCM and the Infotainment Digital Round display. The display computes its response using a non-cryptographic operation instead of a proper challenge-response, allowing an adjacent-network attacker to mathematically derive the user-set unlock PIN from a single observed authentication exchange. An attacker with read access to the in-vehicle network can defeat the motorcycle's primary user-authentication control by passively capturing traffic.
Critical Impact
A single passive capture of the PIN authentication exchange enables full recovery of the user's unlock PIN, defeating the motorcycle's primary authentication mechanism.
Affected Products
- Indian Motorcycle Scout Bobber + Tech 2025 model year
- Wireless Control Module (WCM) firmware
- Infotainment Digital Round display
Discovery Timeline
- 2026-05-29 - CVE-2026-49322 published to NVD
- 2026-05-29 - Last updated in NVD database
Technical Details for CVE-2026-49322
Vulnerability Analysis
The WCM and Infotainment Digital Round display authenticate the user-supplied unlock PIN through a request-response exchange on the in-vehicle network. The display computes its response value using a non-cryptographic transformation of the PIN rather than a keyed cryptographic primitive such as HMAC. Because the operation is mathematically invertible, an observer who captures a single legitimate exchange can solve for the PIN directly. The flaw is categorized as Authentication Bypass by Capture-Replay [CWE-294], although the practical outcome is full credential recovery rather than replay alone. Specific protocol details have been withheld pending vendor remediation, per the ASRG advisory.
Root Cause
The root cause is the use of a non-cryptographic response function in place of a cryptographic challenge-response protocol. A correct design would bind the response to a fresh, unpredictable challenge using a keyed function so that observed exchanges leak no information about the secret PIN. Here, the response is a deterministic function of the PIN that can be inverted by an attacker with knowledge of the algorithm.
Attack Vector
The attack requires physical proximity and read access to the in-vehicle network, such as via a diagnostic port or adjacent-network connection to the motorcycle's bus. The attacker waits for the legitimate user to perform PIN authentication, then captures the single exchange between the Infotainment Digital Round and the WCM. The PIN is then derived offline. User interaction is required because the legitimate PIN entry must occur during the capture window.
No public proof-of-concept code is available. Protocol specifics are withheld pending remediation. See the ASRG Security Advisory for additional context.
Detection Methods for CVE-2026-49322
Indicators of Compromise
- Unexpected diagnostic connector access or unauthorized devices physically attached to the motorcycle's in-vehicle network bus.
- Anomalous read traffic on the WCM-to-display communication channel during periods when the owner is not actively interacting with the vehicle.
- Evidence of tampering around fairings, seat, or service ports providing access to the in-vehicle network.
Detection Strategies
- Inspect the motorcycle for unauthorized hardware taps or logging devices connected to the in-vehicle network before each ride.
- Where supported by future firmware updates, enable any vendor-provided intrusion detection or bus monitoring features on the WCM.
- Maintain a record of authorized service events so that unexplained access to the diagnostic port can be identified.
Monitoring Recommendations
- Track vendor advisories from Indian Motorcycle and ASRG for updated firmware addressing CVE-2026-49322.
- Treat any unexplained PIN prompt behavior, lockouts, or unlock events as potential indicators of PIN compromise and rotate the PIN after remediation is available.
How to Mitigate CVE-2026-49322
Immediate Actions Required
- Restrict physical access to the motorcycle's diagnostic port and in-vehicle network connectors using tamper-evident measures.
- Avoid leaving the motorcycle unattended in environments where an attacker could attach a passive logger and wait for a legitimate PIN entry.
- Treat the unlock PIN as a single-factor control of limited assurance until vendor remediation is delivered.
Patch Information
At the time of publication no vendor patch is referenced in the NVD entry. Specific protocol details have been withheld pending vendor remediation. Owners should monitor the ASRG Security Advisory and Indian Motorcycle service communications for firmware updates to the WCM and Infotainment Digital Round.
Workarounds
- Limit PIN authentication to trusted locations where adjacent-network observation is unlikely.
- Use any secondary anti-theft measures available, such as physical locks or trackers, to compensate for the weakened PIN control.
- Rotate the unlock PIN after any service event involving third-party access to the in-vehicle network.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
