AUGUST 5, 2026
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Case File

CVE-2021-40344

HIGH · CVSS 7.2 EPSS 66.19%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-10-26 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.2. Its EPSS score suggests a 66.2% probability of exploitation in the next 30 days. It may be remotely exploitable.

CVE
CVE-2021-40344
Severity
HIGH
CVSS
7.2
EPSS
66.19%

Original NVD Description

An issue was discovered in Nagios XI 5.8.5. In the Custom Includes section of the Admin panel, an administrator can upload files with arbitrary extensions as long as the MIME type corresponds to an image. Therefore it is possible to upload a crafted PHP script to achieve remote command execution.

Related CVEs

Other vulnerabilities affecting the same vendor(s)