CVE-2022-46403

Pairing interoperability failure via inconsistent reject timing

Published Dec 19, 2022 · Updated Apr 17, 2025

Improper reject handling in Microchip RN4870 firmware 1.43 and PIC LightBlue Explorer Demo 4.2 DT100112 disrupts BLE pairing. During Secure Connections public-key exchange, implementations reject an invalid PublicKeySend at inconsistent protocol stages or fail to reject it. The issue is limited to pairing interoperability; the research classifies it as a specification ambiguity rather than an exploitable attack.

CVSS severity8.6
High
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper reject handling in Microchip RN4870 firmware 1.43 and PIC LightBlue Explorer Demo 4.2 DT100112 disrupts BLE pairing. During Secure Connections public-key exchange, implementations reject an invalid PublicKeySend at inconsistent protocol stages or fail to reject it. The issue is limited to pairing interoperability; the research classifies it as a specification ambiguity rather than an exploitable attack.

The record

CVE
CVE-2022-46403
Published
Dec 19, 2022
Updated
Apr 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-755
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
8.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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