CVE-2020-14957

Local system crash via unvalidated driver IOCTL

Published Jun 30, 2020 · Updated Aug 4, 2024

Improper input validation in AtpKrnl.sys in Windows Cleaning Assistant 3.2 allows local users to crash Windows via IOCTL 0x223CCD. AtpKrnl.sys processes input values supplied through IOCTL 0x223CCD without validating them. A local user with low privileges can reach the driver interface and trigger a blue-screen crash; other effects remain unspecified in the public record.

CVSS severity7.8
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in AtpKrnl.sys in Windows Cleaning Assistant 3.2 allows local users to crash Windows via IOCTL 0x223CCD. AtpKrnl.sys processes input values supplied through IOCTL 0x223CCD without validating them. A local user with low privileges can reach the driver interface and trigger a blue-screen crash; other effects remain unspecified in the public record.

The record

CVE
CVE-2020-14957
Published
Jun 30, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 30, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.1NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:C

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
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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