What is CVE-2020-13646?

CVE-2020-13646 is a high-severity vulnerability in Ijinshan Cheetah Free Wifi, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2020-06-05.

How severe is CVE-2020-13646?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-13646 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Ijinshan Cheetah Free Wifi

CVE-2020-13646

In Cheetah free WiFi 5.1, the driver file (liebaonat.sys) allows local users to cause a denial of service (BSOD) or possibly have unspecified other impact because of not validating input values from IOCtl 0x830020f8, 0x830020E0, 0x830020E4, or 0x8300210c.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2020-06-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (31.7th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Ijinshan Cheetah Free Wifi — versions 5.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

References

github.com/y5s5k5/CVE-2020-13646 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13646?: CVE-2020-13646 is a high-severity vulnerability in Ijinshan Cheetah Free Wifi, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2020-06-05.
How severe is CVE-2020-13646?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-13646 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.