How severe is CVE-2022-46403?

CVE-2022-46403 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2022-46403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-46403?

CVE-2022-46403 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-2022-46403?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-46403 published?

CVE-2022-46403 was published on 2022-12-19 and last updated on 2026-06-17.

CVE-2022-46403

CVE-2022-46403 is a high-severity vulnerability in Microchip Bm78 Firmware with a CVSS 3.x base score of 8.6. 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-755.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-755
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) mishandles reject messages.

Frequently asked questions

What is CVE-2022-46403?: The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) mishandles reject messages.
How severe is CVE-2022-46403?: CVE-2022-46403 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2022-46403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-46403?: CVE-2022-46403 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-2022-46403?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-46403 published?: CVE-2022-46403 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:is1871_firmware:1.43:*:*:*:*:*:*:*
cpe:2.3:o:microchip:is1870_firmware:1.43:*:*:*:*:*:*:*

More vulnerabilities in Microchip Bm78 Firmware

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…
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…

All CVEs affecting Microchip Bm78 Firmware →

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