How severe is CVE-2021-37344?

CVE-2021-37344 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-37344 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 97% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37344?

CVE-2021-37344 affects Nagios Nagios Xi Switch Wizard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37344?

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

When was CVE-2021-37344 published?

CVE-2021-37344 was published on 2021-08-13 and last updated on 2026-06-17.

CVE-2021-37344

CVE-2021-37344 is a critical-severity vulnerability in Nagios Nagios Xi Switch Wizard with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 97% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 97% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Nagios Nagios Xi Switch Wizard
Published: 2021-08-13
Last modified: 2026-06-17

Description

Nagios XI Switch Wizard before version 2.5.7 is vulnerable to remote code execution through improper neutralisation of special elements used in an OS Command (OS Command injection).

Frequently asked questions

What is CVE-2021-37344?: Nagios XI Switch Wizard before version 2.5.7 is vulnerable to remote code execution through improper neutralisation of special elements used in an OS Command (OS Command injection).
How severe is CVE-2021-37344?: CVE-2021-37344 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-37344 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 97% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37344?: CVE-2021-37344 affects Nagios Nagios Xi Switch Wizard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37344?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-37344 published?: CVE-2021-37344 was published on 2021-08-13 and last updated on 2026-06-17.

References

https://www.nagios.com/downloads/nagios-xi/change-log/

Affected products (1)

cpe:2.3:a:nagios:nagios_xi_switch_wizard:*:*:*:*:*:*:*:*

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 →