CVE-2021-25296

Nagios XI OS Command Injection

High 8.8
Exploited: added to CISA KEV 18 Jan 2022

Description

Nagios XI version xi-5.7.5 is affected by OS command injection. The vulnerability exists in the file /usr/local/nagiosxi/html/includes/configwizards/windowswmi/windowswmi.inc.php due to improper sanitization of authenticated user-controlled input by a single HTTP request, which can lead to OS command injection on the Nagios XI server.

Key facts

Published: 15 Feb 2021
Last changed: 9 Jul 2026
Assigned by: mitre
KEV added: 18 Jan 2022
KEV fix due: 1 Feb 2022
EPSS: 71.935% likely to be exploited in the next 30 days, higher than 99.437% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

8.8CVSS 3.1, Highfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What to do

Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
n/a	n/a	n/a (affected)

Timeline

15 Feb 2021 Published
18 Jan 2022 CVE-2021-25296 added to CISA KEV
18 Jan 2022 Added to the CISA KEV catalogue