CVE-2022-21757Network attack vector

Remote system crash via missing count check

Published Jun 6, 2022 · Updated Aug 3, 2024

Uncontrolled resource consumption in MediaTek Wi-Fi firmware on Android 11.0 and 12.0 allows remote attackers to crash affected systems. The firmware uses a count without the required check, permitting excessive resource consumption until the system crashes. No authentication, additional execution privileges, or user interaction is required; the published consequence is a crash, not code execution.

CVSS severity7.5
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in MediaTek Wi-Fi firmware on Android 11.0 and 12.0 allows remote attackers to crash affected systems. The firmware uses a count without the required check, permitting excessive resource consumption until the system crashes. No authentication, additional execution privileges, or user interaction is required; the published consequence is a crash, not code execution.

The record

CVE
CVE-2022-21757
Published
Jun 6, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-354, CWE-400, CAPEC-227, CAPEC-147, CAPEC-492, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-354Improper Validation of Integrity Check Value
CWE-400Uncontrolled Resource Consumption
CAPEC-227Sustained Client Engagement
CAPEC-147XML Ping of the Death
CAPEC-492Regular Expression Exponential Blowup
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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