CVE-2026-49323
Indian Scout Bobber 2025 WCM-to-ECM weak authentication
- Published
- Updated
- Reserved
- Assigned by
- ASRG
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ASRGCNA (assigner) | 4.0 | Medium4.1 | CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| ASRGCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVDNVD · Deferred | 4.0 | Medium4.1 | CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/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 |
- EPSS (exploitation in 30 days)
- 0.11% · top 99% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.1.
Weakness
Affected products
Indian Motorcycle · Scout Bobber + Tech
- affected 2025
What to do
Solution: Replace the non-cryptographic authentication response with HMAC-SHA-256 or ECDSA over a fresh nonce, ECU identifier, and session counter; provision per-vehicle symmetric keys in tamper-resistant secure elements on both authenticating modules.
References (1)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-49323)Record last updated .