The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo…
Priority LOW 25CWE-287Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-287.
Summary
The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) allows attackers to bypass passkey entry in legacy pairing.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00639 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 18
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microchip:bm78_firmware:1.43:*:*:*:*:*:*:* | 1.43 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:bm78:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
| cpe:2.3:o:microchip:bm83_firmware:1.43:*:*:*:*:*:*:* | 1.43 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:bm83:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
| cpe:2.3:o:microchip:rn4870_firmware:1.43:*:*:*:*:*:*:* | 1.43 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:rn4870:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
| cpe:2.3:o:microchip:rn4871_firmware:1.43:*:*:*:*:*:*:* | 1.43 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:rn4871:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
| cpe:2.3:o:microchip:bm70_firmware:1.43:*:*:*:*:*:*:* | 1.43 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:bm70:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
- cpe:2.3:o:microchip:bm78_firmware:1.43:*:*:*:*:*:*:* Versions 1.43 Vulnerable ·Microchip
- cpe:2.3:h:microchip:bm78:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
- cpe:2.3:o:microchip:bm83_firmware:1.43:*:*:*:*:*:*:* Versions 1.43 Vulnerable ·Microchip
- cpe:2.3:h:microchip:bm83:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
- cpe:2.3:o:microchip:rn4870_firmware:1.43:*:*:*:*:*:*:* Versions 1.43 Vulnerable ·Microchip
- cpe:2.3:h:microchip:rn4870:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
- cpe:2.3:o:microchip:rn4871_firmware:1.43:*:*:*:*:*:*:* Versions 1.43 Vulnerable ·Microchip
- cpe:2.3:h:microchip:rn4871:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
- cpe:2.3:o:microchip:bm70_firmware:1.43:*:*:*:*:*:*:* Versions 1.43 Vulnerable ·Microchip
- cpe:2.3:h:microchip:bm70:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
Show 8 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microchip:bm71_firmware:1.43:*:*:*:*:*:*:* | 1.43 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:bm71:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
| cpe:2.3:o:microchip:pic_lightblue_explorer_demo_firmware:4.2_dt100112:*:*:*:*:*:*:* | 4.2_dt100112 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:pic_lightblue_explorer_demo:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
| cpe:2.3:o:microchip:is1870_firmware:1.43:*:*:*:*:*:*:* | 1.43 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:is1870:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
| cpe:2.3:o:microchip:is1871_firmware:1.43:*:*:*:*:*:*:* | 1.43 | Vulnerable | Microchip |
| cpe:2.3:h:microchip:is1871:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microchip |
- cpe:2.3:o:microchip:bm71_firmware:1.43:*:*:*:*:*:*:* Versions 1.43 Vulnerable ·Microchip
- cpe:2.3:h:microchip:bm71:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
- cpe:2.3:o:microchip:pic_lightblue_explorer_demo_firmware:4.2_dt100112:*:*:*:*:*:*:* Versions 4.2_dt100112 Vulnerable ·Microchip
- cpe:2.3:h:microchip:pic_lightblue_explorer_demo:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
- cpe:2.3:o:microchip:is1870_firmware:1.43:*:*:*:*:*:*:* Versions 1.43 Vulnerable ·Microchip
- cpe:2.3:h:microchip:is1870:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
- cpe:2.3:o:microchip:is1871_firmware:1.43:*:*:*:*:*:*:* Versions 1.43 Vulnerable ·Microchip
- cpe:2.3:h:microchip:is1871:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microchip
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2022-46400
- 2026-10-03 Alias added: GHSA-g8ch-8r7r-4wwj
- 2026-10-23 EPSS moved to the 50th–90th percentile
References
Advisory 2
Other 1
More Microchip Bm70 Firmware vulnerabilities
- TI-2022-22934 The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo… CVSS 3.1HIGH 8.6
- TI-2022-22930 The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo… CVSS 3.1HIGH 7.5
- TI-2022-22933 The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo… CVSS 3.1MEDIUM 6.5
- TI-2022-22932 The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo… CVSS 3.1MEDIUM 5.4
Sources
- CVE-2022-46400 · CVE Program
- CVE-2022-46400 · NVD
- FIRST EPSS
- GHSA-g8ch-8r7r-4wwj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences