How severe is CVE-2020-21999?

CVE-2020-21999 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-21999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-21999?

CVE-2020-21999 primarily affects Iwt Facesentry Access Control System Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-21999?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-21999 published?

CVE-2020-21999 was published on 2021-05-04 and last updated on 2026-06-17.

CVE-2020-21999

CVE-2020-21999 is a high-severity vulnerability in Iwt Facesentry Access Control System Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Iwt Facesentry Access Control System Firmware
Published: 2021-05-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-21999?: 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.
How severe is CVE-2020-21999?: CVE-2020-21999 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-21999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-21999?: CVE-2020-21999 primarily affects Iwt Facesentry Access Control System Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-21999?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-21999 published?: CVE-2020-21999 was published on 2021-05-04 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:iwt:facesentry_access_control_system_firmware:5.7.0:*:*:*:*:*:*:*
cpe:2.3:o:iwt:facesentry_access_control_system_firmware:5.7.2:*:*:*:*:*:*:*
cpe:2.3:o:iwt:facesentry_access_control_system_firmware:6.4.8:*:*:*:*:*:*:*

More vulnerabilities in Iwt Facesentry Access Control System Firmware

CVE-2019-25241 — Critical (CVSS 9.8): FaceSentry Access Control System 6.4.8 contains a critical authentication vulnerability with hard-coded SSH credentials…
CVE-2019-25243 — High (CVSS 8.8): FaceSentry 6.4.8 contains an authenticated remote command injection vulnerability in pingTest.php and tcpPortTest.php…
CVE-2019-25279 — High (CVSS 7.5): FaceSentry Access Control System 6.4.8 contains a cleartext password storage vulnerability that allows attackers to…
CVE-2019-25277 — Medium (CVSS 6.1): FaceSentry Access Control System 6.4.8 contains a cross-site scripting vulnerability in the 'msg' parameter of…
CVE-2019-25278 — Medium (CVSS 5.9): FaceSentry Access Control System 6.4.8 contains a cleartext transmission vulnerability that allows remote attackers to…
CVE-2019-25242 — Medium (CVSS 4.3): FaceSentry Access Control System 6.4.8 contains a cross-site request forgery vulnerability that allows attackers to…

All CVEs affecting Iwt Facesentry Access Control System Firmware →

Other CWE-78 (OS Command Injection) vulnerabilities

CVE-2026-56004 — Critical (CVSS 10.0): A shellcode injection in the mercurial handler of the obs tar_scm source service before version 0.12.4 could be used by…
CVE-2026-56415 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability within the debug.pl script that is…
CVE-2026-56413 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability in the ms_service.pl service, which listens…
CVE-2026-49869 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in…
CVE-2026-49261 — Critical (CVSS 10.0): MariaDB server is a community developed fork of MySQL server. Versions 10.6.1 through 10.6.26, 10.11.1 through…
CVE-2026-10520 — Critical (CVSS 10.0): An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a…

Browse all CWE-78 (OS Command Injection) vulnerabilities →