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Vulnerability record · CVE-2020-6581 · published 16 March 2020

CVE-2020-6581: Nagios remote plug in executor vulnerability

Nagios · Remote Plug In Executor

Nagios NRPE 3.2.1 has Insufficient Filtering because, for example, nasty_metachars interprets \n as the character \ and the character n (not as the \n newline sequence). This can cause command injection.

7.3 CVSS 3.1 High EPSS 1.6% · top 25.0%
7.3CVSS 3.1 base score, v2 3.7
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Nagios NRPE 3.2.1 has Insufficient Filtering because, for example, nasty_metachars interprets \n as the character \ and the character n (not as the \n newline sequence). This can cause command injection.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://herolab.usd.de/security-advisories/ Third Party Advisory
https://herolab.usd.de/security-advisories/usd-2020-0002/ ExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DNGKXVDB43E3KQRA6W5QZT
https://herolab.usd.de/security-advisories/ Third Party Advisory
https://herolab.usd.de/security-advisories/usd-2020-0002/ ExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2DNGKXVDB43E3KQRA6W5QZT

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-6581), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.