Security readout for executives and security teams
Plain-English summary
This CVE describes an authentication weakness in BYD Dilink Headunit System v3.0 to v4.0. The public record says an attacker can bypass authentication through brute-force attempts. The rating is critical because successful abuse could affect confidentiality, integrity, and availability, but the sources do not confirm active exploitation or a vendor patch.
Executive priority
Treat this as urgent for organizations operating affected BYD vehicle headunits, especially where systems are network-reachable. The impact rating is critical, but remediation decisions depend on confirming deployed versions and obtaining vendor-backed guidance because the public record lacks patch details.
Technical view
CVE-2024-46442 is mapped to CWE-307 and has CVSS 3.1 score 9.8: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The description states authentication bypass via brute force against BYD Dilink Headunit System v3.0-v4.0. Structured affected vendor, product, CPE, and fixed-version data are not provided.
Likely exposure
Exposure is most likely limited to environments with BYD Dilink headunit systems running v3.0 to v4.0. The bundle does not provide CPEs, deployment details, or reachable service information, so asset owners must validate exposure through inventory and vendor confirmation.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no cited source confirms exploitation in the wild. Public information indicates brute-force authentication bypass risk, but does not provide verified exploit status, affected interfaces, or operational prerequisites beyond the CVSS vector.
Researcher notes
The evidence base is thin: the CVE record gives description, CWE, and CVSS, while structured affected-product data is n/a. Do not assume broader BYD impact, active exploitation, or fixed versions without vendor or CVE updates. Validate only in authorized environments.
Mitigation direction
- Check BYD guidance for firmware updates, fixes, or configuration mitigations.
- Inventory BYD Dilink headunits and identify v3.0 to v4.0 systems.
- Reduce network exposure for affected headunit management or authentication surfaces.
- Enable rate limiting or account lockout where vendor-supported.
- Monitor for repeated failed authentication attempts.
- Prioritize firmware updates once vendor-fixed versions are confirmed.
Validation and detection
- Confirm whether any deployed BYD Dilink headunits run v3.0 to v4.0.
- Review network paths to any headunit authentication interfaces.
- Check authentication logs for high-volume failed login patterns.
- Compare installed firmware against current BYD support guidance.
- Track the CVE record and referenced repository for updated affected-version details.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-307: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-46442 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.bydauto.com.cn/CVE reference, mitre
- https://github.com/zgsnj123/BYD_headunit_vuls/tree/mainCVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Excessive Authentication Attempts
Improper Restriction of Excessive Authentication Attempts represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.