CVE-2022-34326

Wi-Fi service hang via Soft AP deadlock

Published Sep 27, 2022 · Updated May 21, 2025

Deadlock in Realtek amb1_sdk before 2022-06-20 allows physically proximate attackers to suspend Wi-Fi service in Soft AP mode. Frequent, continuous four-way-handshake failures leave the timer and RX tasks locked; Realtek has not disclosed the faulty lock operation. Successful exploitation hangs Wi-Fi communication and blocks device registration until restart; Soft AP mode and Wi-Fi proximity are required.

CVSS severity7.5
High
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deadlock in Realtek amb1_sdk before 2022-06-20 allows physically proximate attackers to suspend Wi-Fi service in Soft AP mode. Frequent, continuous four-way-handshake failures leave the timer and RX tasks locked; Realtek has not disclosed the faulty lock operation. Successful exploitation hangs Wi-Fi communication and blocks device registration until restart; Soft AP mode and Wi-Fi proximity are required.

The record

CVE
CVE-2022-34326
Published
Sep 27, 2022
Updated
May 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-833, CWE-400, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 27, 2022CVE publishedPublication date reported by the CVE source.
  2. May 21, 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1Mitsubishi ElectricCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

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-833Deadlock
CWE-400Uncontrolled Resource Consumption
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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