CVE-2020-13646Public exploit

Local denial of service via unvalidated IOCTL input

Published Jun 5, 2020 · Updated Aug 4, 2024

Improper input validation in Cheetah free WiFi 5.1 allows local users to cause a denial of service via crafted IOCTL requests. The liebaonat.sys driver fails to validate values supplied through IOCTL codes 0x830020f8, 0x830020E0, 0x830020E4, and 0x8300210c, which can trigger a Windows blue screen. Exploitation requires local access and the documented consequence is service interruption; other impact remains unspecified.

CVSS severity7.8
High
EPSS probability0.40%
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 Cheetah free WiFi 5.1 allows local users to cause a denial of service via crafted IOCTL requests. The liebaonat.sys driver fails to validate values supplied through IOCTL codes 0x830020f8, 0x830020E0, 0x830020E4, and 0x8300210c, which can trigger a Windows blue screen. Exploitation requires local access and the documented consequence is service interruption; other impact remains unspecified.

The record

CVE
CVE-2020-13646
Published
Jun 5, 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 5, 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

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

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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 exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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