CVE-2022-46401 — The Microchip RN4870 module firmware 1
The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) accepts PauseEncReqPlainText before pairing is complete.
Published
2022-12-19T00:00:00.000Z
Last modified
2025-04-17T14:29:14.157Z
01What is this vulnerability?
The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) accepts PauseEncReqPlainText before pairing is complete.
02Affected products
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2022-12-19T00:00:00.000Z
- Last modified: 2025-04-17T14:29:14.157Z
09References
- www.computer.org — https://www.computer.org/csdl/proceedings/sp/2023/1He7WWuJExG
- www.computer.org — https://www.computer.org/csdl/proceedings-article/sp/2023/933600a521/1He7Yja1AYM
- microchip.com — https://microchip.com
- www.microchip.com — https://www.microchip.com/en-us/products/wireless-connectivity/software-vulnerab…
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