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Nagios · Nagios XI

CVE-2021-25296

Nagios XI OS Command Injection

CISA KEV record

CISA date added
2022-01-18
CISA due date
2022-02-01
Known ransomware use
Unknown

NVD risk context

8.8 HIGH

CVSS is a technical severity score. CISA’s KEV status remains the evidence that this vulnerability is known to be exploited.

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Attack vector
Network
The vulnerable service can be reached remotely over a network.
Attack complexity
Low
Exploitation does not require unusual conditions beyond normal attacker control.
Privileges required
Low
The attacker needs limited privileges before exploiting the issue.
User interaction
None
No action by another user is required.

Description

Nagios XI contains a vulnerability which can lead to OS command injection on the Nagios XI server.

Required action

Apply updates per vendor instructions.

NVD reference index

Vendor and remediation references

NVD has not tagged a reference for this KEV as a patch, mitigation, release note, or vendor advisory.

Other NVD references (6)

MITRE CWE context

CWE classification

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

View official MITRE CWE details ↗
CWE-138 Improper Neutralization of Special Elements

The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as control elements or syntactic markers when they are sent to a downstream component.

View official MITRE CWE details ↗

NVD record timing

NVD record timeline

These dates describe NVD’s record, not CISA’s KEV addition or remediation due date.

NVD published
Feb 15, 2021, 01:15 PM UTC
When NVD first published this CVE record.
NVD last updated
Jul 09, 2026, 01:39 PM UTC
When NVD last changed its analysis or record data.
Advanced: view the technical CVSS vector

This standardized code is intended for security tools and technical analysts. The plain-language risk summary above explains its main points.

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

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CISA notes

https://nvd.nist.gov/vuln/detail/CVE-2021-25296