CVE-2022-45190Public exploit

Authentication bypass via zero-key PairRandomSend acceptance

Published Feb 7, 2023 · Updated Mar 25, 2025

Authentication bypass in Microchip RN4870 firmware 1.43 allows physically proximate attackers to complete BLE legacy pairing without a passkey. A crafted PairRandomSend with the passkey set to zero makes the module respond before passkey input and complete pairing and bonding with a zero temporary key. BLE radio range and passkey-entry legacy pairing are required, after which the attacker can impersonate both peers and intercept or alter the BLE connection.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Microchip RN4870 firmware 1.43 allows physically proximate attackers to complete BLE legacy pairing without a passkey. A crafted PairRandomSend with the passkey set to zero makes the module respond before passkey input and complete pairing and bonding with a zero temporary key. BLE radio range and passkey-entry legacy pairing are required, after which the attacker can impersonate both peers and intercept or alter the BLE connection.

The record

CVE
CVE-2022-45190
Published
Feb 7, 2023
Updated
Mar 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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

5.3CISA-ADPCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
5.3NIST NVDCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/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 exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1557Adversary-in-the-Middle

Public exploit references

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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