CVE-2020-21999

Name: CVE-2020-21999
Creator: NVD / NIST
Published: 2021-05-04T16:15:07.777+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 5.24%

Last modified Jun 17, 2026

CVE-2020-21999 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. iWT Ltd FaceSentry Access Control System 6.4.8 suffers from an authenticated OS command injection vulnerability using default credentials. This can be exploited to inject and execute arbitrary shell commands as the root user via the 'strInIP' POST parameter in pingTest PHP script.. EPSS estimates a 5.24% chance of exploitation in the next 30 days.

Description

iWT Ltd FaceSentry Access Control System 6.4.8 suffers from an authenticated OS command injection vulnerability using default credentials. This can be exploited to inject and execute arbitrary shell commands as the root user via the 'strInIP' POST parameter in pingTest PHP script.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

5.24%

91.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Iwt	Facesentry Access Control System Firmware	5.7.0
Iwt	Facesentry Access Control System Firmware	5.7.2
Iwt	Facesentry Access Control System Firmware	6.4.8

References

https://www.exploit-db.com/exploits/47066Exploit, Third Party Advisory, VDB Entry
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5525.phpExploit, Third Party Advisory
https://www.exploit-db.com/exploits/47066Exploit, Third Party Advisory, VDB Entry
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5525.phpExploit, Third Party Advisory

Timeline

Published: May 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21999?

How severe is CVE-2020-21999?

CVE-2020-21999 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 5.24% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21999?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-21999?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST