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GHSA-F65X-W4FQ-XJ28

Vulnerability from github – Published: 2026-05-29 15:30 – Updated: 2026-05-29 15:30

Details

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.

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

4.1 (Medium)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-49323"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-327"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-29T13:16:23Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-f65x-w4fq-xj28",
  "modified": "2026-05-29T15:30:33Z",
  "published": "2026-05-29T15:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49323"
    },
    {
      "type": "WEB",
      "url": "https://www.asrg.io/security-advisories/cve-2026-49323-indian-scout-wcm-ecm-weak-authentication"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-49323 (GCVE-0-2026-49323)

Vulnerability from cvelistv5 – Published: 2026-05-29 12:31 – Updated: 2026-05-29 13:44

Title

Indian Scout Bobber 2025 WCM-to-ECM weak authentication

Summary

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

4.1 (Medium)


                        
                          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

CWE

CWE-1390 - Weak Authentication
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
CWE-798 - Use of Hard-coded Credentials

Assigner

ASRG

References

1 reference

URL	Tags
https://www.asrg.io/security-advisories/cve-2026-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Indian Motorcycle (Polaris Inc.)	Scout Bobber + Tech	Affected: 2025 (model-year)

Date Public

2026-05-29 15:00

Credits

Scott Sheahan, Rustic Security LLC

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-F65X-W4FQ-XJ28

CVE-2026-49323 (GCVE-0-2026-49323)

Tags

Sightings

Nomenclature