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01 Record

CVE-2022-46403

The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) mishandles reject messages.

HighPUBLISHEDCNA: mitre
CNA base score8.6 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

02 Description

The Microchip RN4870 module firmware 1.43 (and the Microchip PIC LightBlue Explorer Demo 4.2 DT100112) mishandles reject messages.

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.88% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 59.2% of scored records. A rank, not a probability.
NVD base score
8.6 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-12-19 00:00Z3 YR AGO
Last updated
2025-04-17 14:09Z1 YR AGO
Reserved
2022-12-04
Assigning CNA
mitre
Record state
PUBLISHED
Severity
High (CVSS 8.6)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
Weaknesses
  • CWE-755Improper Handling of Exceptional ConditionsClass
Data version
5.1
Document digest
1c03d7447c28e110448f7bd462306a70087da0d0525728e6308c15e58ebfbe18

05 Affected products

VendorProductVersionsPlatforms
microchipbm70Not specified—
microchipbm70_firmwareNot specified—
microchipbm71Not specified—
microchipbm71_firmwareNot specified—
microchipbm78Not specified—
microchipbm78_firmwareNot specified—
microchipbm83Not specified—
microchipbm83_firmwareNot specified—
microchipis1870Not specified—
microchipis1870_firmwareNot specified—
microchipis1871Not specified—
microchipis1871_firmwareNot specified—
microchippic_lightblue_explorer_demoNot specified—
microchippic_lightblue_explorer_demo_firmwareNot specified—
microchiprn4870Not specified—
microchiprn4870_firmwareNot specified—
microchiprn4871Not specified—
microchiprn4871_firmwareNot specified—

06 References