How severe is CVE-2022-46400?

CVE-2022-46400 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-2022-46400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-46400?

CVE-2022-46400 primarily affects Microchip Bm78 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-46400?

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

When was CVE-2022-46400 published?

CVE-2022-46400 was published on 2022-12-19 and last updated on 2026-06-17.

CVE-2022-46400

CVE-2022-46400 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-287.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
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) allows attackers to bypass passkey entry in legacy pairing.

Frequently asked questions

What is CVE-2022-46400?: 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.
How severe is CVE-2022-46400?: CVE-2022-46400 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-2022-46400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-46400?: CVE-2022-46400 primarily affects Microchip Bm78 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-46400?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-46400 published?: CVE-2022-46400 was published on 2022-12-19 and last updated on 2026-06-17.

References

Affected products (9)

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:is1870_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:is1871_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-2022-46401 — Medium (CVSS 5.4): The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) accepts…

All CVEs affecting Microchip Bm78 Firmware →

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CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

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