CVE-2022-46399

Exp

The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) is unresponsive with ConReqTimeoutZero.

Published: 2022-12-19 Last update: 2025-04-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-46399 is rated Exploit Available (58.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.16%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2022-46399

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

Exploit prediction scoring system (EPSS) score for CVE-2022-46399

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-09-13 0.12% 0.16% +0.04%
2 2025-03-30 0.21% 0.12% -0.09%
3 2025-03-29 — 0.21% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-46399

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H 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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2022-46399

Affected software / configurations for CVE-2022-46399

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 bm64_firmware 1.43 cpe:2.3:o:microchip:bm64_firmware:1.43:*:*:*:*:*:*:*
microchip bm77_firmware 1.43 cpe:2.3:o:microchip:bm77_firmware:1.43:*:*:*:*:*:*:*
microchip is1870_firmware 1.43 cpe:2.3:o:microchip:is1870_firmware:1.43:*:*:*:*:*:*:*
microchip is1871_firmware 1.43 cpe:2.3:o:microchip:is1871_firmware:1.43:*:*:*:*:*:*:*
microchip rn4678_firmware 1.43 cpe:2.3:o:microchip:rn4678_firmware:1.43:*:*:*:*:*:*:*
microchip pic32cx1012bz25048_firmware 1.43 cpe:2.3:o:microchip:pic32cx1012bz25048_firmware:1.43:*:*:*:*:*:*:*
microchip wbz451_firmware 1.43 cpe:2.3:o:microchip:wbz451_firmware:1.43:*:*:*:*:*:*:*

References for CVE-2022-46399

cvelogic Threat Intelligence