How severe is CVE-2022-46401?

CVE-2022-46401 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2022-46401 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-46401?

CVE-2022-46401 primarily affects Microchip Bm78 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-46401?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-46401 published?

CVE-2022-46401 was published on 2022-12-19 and last updated on 2026-06-17.

CVE-2022-46401

CVE-2022-46401 is a medium-severity vulnerability in Microchip Bm78 Firmware with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microchip Bm78 Firmware
Published: 2022-12-19
Last modified: 2026-06-17

Description

The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) accepts PauseEncReqPlainText before pairing is complete.

Frequently asked questions

What is CVE-2022-46401?: The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) accepts PauseEncReqPlainText before pairing is complete.
How severe is CVE-2022-46401?: CVE-2022-46401 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2022-46401 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-46401?: CVE-2022-46401 primarily affects Microchip Bm78 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-46401?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-46401 published?: CVE-2022-46401 was published on 2022-12-19 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:o:microchip:bm78_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:bm83_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:rn4870_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:rn4871_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:bm70_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:bm71_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:pic_lightblue_explorer_demo_firmware:4.2_dt100112:*:*:*:*:*:*:*
cpe:2.3:o:microchip:pic32cx1012bz25048_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:microchip:wbz451_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:microchip:rn4678_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:bm77_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:bm64_firmware:1.43:*:*:*:*:*:*:*

More vulnerabilities in Microchip Bm78 Firmware

CVE-2022-46403 — High (CVSS 8.6): The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) mishandles…
CVE-2022-46399 — High (CVSS 7.5): The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) is unresponsive…
CVE-2022-46402 — Medium (CVSS 6.5): The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) accepts…
CVE-2022-46400 — Medium (CVSS 5.4): The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) allows attackers…

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