CVE-2026-65934

BLE pairing interruption via plaintext pause request

Published Aug 13, 2026 · Updated Aug 13, 2026

Denial of service in Silicon Labs BT122 1.4.0 and earlier allows physically proximate attackers to interrupt BLE pairing. The BLE link layer accepts an unencrypted pause-encryption request after public-key exchange and then cannot finish pairing. Exploitation requires malicious traffic injection during a target's first pairing with another device; recovery requires manual pairing re-initiation.

CVSS severity7.1
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Silicon Labs BT122 1.4.0 and earlier allows physically proximate attackers to interrupt BLE pairing. The BLE link layer accepts an unencrypted pause-encryption request after public-key exchange and then cannot finish pairing. Exploitation requires malicious traffic injection during a target's first pairing with another device; recovery requires manual pairing re-initiation.

The record

CVE
CVE-2026-65934
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
Sigma Designs
Product
BT122
Classifications
CWE-440, CAPEC-113, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.4.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Sigma Designs · BT122version=0 <=1.4.0

Published CVSS scores

7.1Silicon LabsCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-440Expected Behavior Violation
CAPEC-113Interface Manipulation
T1499Endpoint Denial of Service

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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