CVE-2021-25296VulnerabilityPublished 01/18/2022Updated 10/24/2026

CVE-2021-25296: Nagios XI OS Command Injection

Affects Nagios Nagios XISource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 01/18/2022
KEV deadline: 02/01/2022
EPSS: 71.9% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2021-25296 (opens in a new tab)

Description

Nagios XI contains a vulnerability that allows OS command injection on the server. This vulnerability has been exploited in the wild and is considered high severity. No specific affected versions or patch information is provided in the available data.

Summary

CVE-2021-25296 is an OS command injection vulnerability in Nagios XI. This flaw allows an attacker to execute arbitrary operating system commands on the Nagios XI server, potentially leading to full system compromise. The vulnerability has been confirmed to be exploited in the wild. No detailed version information or patch status is provided in the source data.

Impact

Successful exploitation of this vulnerability can lead to arbitrary command execution on the Nagios XI server, which may result in unauthorized access, data compromise, or disruption of monitoring services. The vulnerability is actively exploited in the wild, increasing the risk to affected systems.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the Nagios XI server and monitor for suspicious activity related to command execution attempts.

CVE-2021-25296: Nagios XI OS Command Injection

What to do

Description

Summary

Impact

Mitigation

Weaknesses

References

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:57:21 UTC

Weaknesses

References

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