CVE-2022-46401 [Medium] | Input Validation Bypass in Bm78 Firmware

CVE-2022-46401 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.05%). 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
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Kind

Published

Link

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Exploit-DB ↗

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2024-01-21	0.05%	0.05%	+0.01%
2	2023-12-26	0.06%	0.05%	-0.01%
3	2023-03-07	—	0.06%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2024-01-21

0.05%

+0.01%

2023-12-26

0.06%

0.05%

-0.01%

2023-03-07

—

0.06%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
5.4	3.1	MEDIUM	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L` Click to expand Attack vector (AV:A) Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet. 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:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.8	2.5	[email protected]
5.4	3.1	MEDIUM	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L` Click to expand Attack vector (AV:A) Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet. 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:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.8	2.5	134c704f-9b21-4f2e-91b3-4a467353bcc0

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

5.4

3.1

MEDIUM

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

Attack vector (AV:A): Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
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:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.8

2.5

[email protected]

5.4

3.1

MEDIUM

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

Attack vector (AV:A): Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
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:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.8

2.5

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

Affected software / configurations for CVE-2022-46401

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	pic32cx1012bz25048_firmware	—	cpe:2.3:o:microchip:pic32cx1012bz25048_firmware:-:::::::*
microchip	wbz451_firmware	—	cpe:2.3:o:microchip:wbz451_firmware:-:::::::*
microchip	rn4678_firmware	1.43	cpe:2.3:o:microchip:rn4678_firmware:1.43:::::::*
microchip	bm77_firmware	1.43	cpe:2.3:o:microchip:bm77_firmware:1.43:::::::*
microchip	bm64_firmware	1.43	cpe:2.3:o:microchip:bm64_firmware:1.43:::::::*

References for CVE-2022-46401

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-2022-46401

Public exploit references (Exploit-DB) for CVE-2022-46401

Exploit prediction scoring system (EPSS) score for CVE-2022-46401

Common vulnerability scoring system (CVSS) metrics for CVE-2022-46401

Weakness enumeration for CVE-2022-46401

Affected software / configurations for CVE-2022-46401

References for CVE-2022-46401