CVE-2021-27220

Name: CVE-2021-27220
Creator: NVD / NIST
Published: 2021-03-31T22:15:14.397+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 2.03%

Last modified Jun 17, 2026

CVE-2021-27220 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in PRTG Network Monitor before 21.1.66.1623. By invoking the screenshot functionality with prepared context paths, an attacker is able to verify the existence of certain files on the filesystem of the PRTG's Web server.. EPSS estimates a 2.03% chance of exploitation in the next 30 days.

Description

An issue was discovered in PRTG Network Monitor before 21.1.66.1623. By invoking the screenshot functionality with prepared context paths, an attacker is able to verify the existence of certain files on the filesystem of the PRTG's Web server.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

2.03%

78.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Paessler	Prtg Network Monitor	< 21.1.66.1623

References

https://www.paessler.com/prtg/history/stable#21.1.66.1623Release Notes, Vendor Advisory
https://www.paessler.com/prtg/history/stable#21.1.66.1623Release Notes, Vendor Advisory

Timeline

Published: Mar 31, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27220?

How severe is CVE-2021-27220?

CVE-2021-27220 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.03% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27220?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27220?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST