How severe is CVE-2021-37346?

CVE-2021-37346 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-2021-37346 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 74% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37346?

CVE-2021-37346 affects Nagios Nagios Xi Watchguard Wizard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-37346?

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-2021-37346 published?

CVE-2021-37346 was published on 2021-08-13 and last updated on 2026-06-17.

CVE-2021-37346

CVE-2021-37346 is a critical-severity vulnerability in Nagios Nagios Xi Watchguard Wizard with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 74% places it in the 99th 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: 74% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Nagios Nagios Xi Watchguard Wizard
Published: 2021-08-13
Last modified: 2026-06-17

Description

Nagios XI WatchGuard Wizard before version 1.4.8 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-2021-37346?: Nagios XI WatchGuard Wizard before version 1.4.8 is vulnerable to remote code execution through Improper neutralisation of special elements used in an OS Command (OS Command injection).
How severe is CVE-2021-37346?: CVE-2021-37346 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-2021-37346 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 74% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37346?: CVE-2021-37346 affects Nagios Nagios Xi Watchguard Wizard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-37346?: 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-2021-37346 published?: CVE-2021-37346 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_watchguard_wizard:*:*:*:*:*:*:*:*

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