CVE-2022-46403 [High] | Security Vulnerability in Bm78 Firmware

CVE-2022-46403 is rated High Exploit Risk (67.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.30%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

EDB-ID	Source	Kind	Published	Link
—	nvd_ref	exploit_tag		Exploit-DB ↗

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Source

Kind

Published

Link

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nvd_ref

exploit_tag

Exploit-DB ↗

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-04-03	0.46%	0.30%	-0.16%
2	2025-12-21	0.22%	0.46%	+0.24%
3	2025-11-21	—	0.22%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-04-03

0.46%

0.30%

-0.16%

2025-12-21

0.22%

0.46%

+0.24%

2025-11-21

—

0.22%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.6	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	3.9	4.0	[email protected]
8.6	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	3.9	4.0	134c704f-9b21-4f2e-91b3-4a467353bcc0

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.6

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

3.9

4.0

[email protected]

8.6

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

3.9

4.0

134c704f-9b21-4f2e-91b3-4a467353bcc0

Affected software / configurations for CVE-2022-46403

Vendor	Product	Version	Raw CPE
microchip	bm78_firmware	1.43	cpe:2.3:o:microchip:bm78_firmware:1.43:::::::*
microchip	bm83_firmware	1.43	cpe:2.3:o:microchip:bm83_firmware:1.43:::::::*
microchip	rn4870_firmware	1.43	cpe:2.3:o:microchip:rn4870_firmware:1.43:::::::*
microchip	rn4871_firmware	1.43	cpe:2.3:o:microchip:rn4871_firmware:1.43:::::::*
microchip	bm70_firmware	1.43	cpe:2.3:o:microchip:bm70_firmware:1.43:::::::*
microchip	bm71_firmware	1.43	cpe:2.3:o:microchip:bm71_firmware:1.43:::::::*
microchip	pic_lightblue_explorer_demo_firmware	4.2_dt100112	cpe:2.3:o:microchip:pic_lightblue_explorer_demo_firmware:4.2_dt100112:::::::*
microchip	is1871_firmware	1.43	cpe:2.3:o:microchip:is1871_firmware:1.43:::::::*
microchip	is1870_firmware	1.43	cpe:2.3:o:microchip:is1870_firmware:1.43:::::::*

References for CVE-2022-46403

URL	Tags
https://microchip.com	Product
https://www.computer.org/csdl/proceedings-article/sp/2023/933600a521/1He7Yja1AYM	Exploit Technical Description Third Party Advisory
https://www.computer.org/csdl/proceedings/sp/2023/1He7WWuJExG	Third Party Advisory
https://www.microchip.com/en-us/products/wireless-connectivity/software-vulnerability-response/deviating-behaviors-in-bluetooth-le	Vendor Advisory

URL

CVE-2022-46403

Public exploit references (Exploit-DB) for CVE-2022-46403

Exploit prediction scoring system (EPSS) score for CVE-2022-46403

Common vulnerability scoring system (CVSS) metrics for CVE-2022-46403

Weakness enumeration for CVE-2022-46403

Affected software / configurations for CVE-2022-46403

References for CVE-2022-46403