Read the docs
TI-2021-08763 Aliases CVE-2021-27220GHSA-cjhp-wcj5-mpxc

An issue was discovered in PRTG Network Monitor before 21.1.66.1623.

Priority LOW 28Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.01828 78th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:paessler:prtg_network_monitor:*:*:*:*:*:*:*:*before 21.1.66.1623VulnerablePaessler
  • cpe:2.3:a:paessler:prtg_network_monitor:*:*:*:*:*:*:*:* Versions before 21.1.66.1623 Vulnerable ·Paessler

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-27220
  2. 2026-10-03 Alias added: GHSA-cjhp-wcj5-mpxc

References

Advisory 1

  • TI-2018-13743 PRTG Network Monitor before 18.2.40.1683 allows remote unauthenticated attackers to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-06724 An issue was discovered in PRTG Network Monitor before 18.2.39. KEVCVSS 3.1HIGH 7.2
  • TI-2023-16035 A command injection was identified in PRTG 23.2.84.1566 and earlier versions in the Dicom… CVSS 3.1HIGH 7.2
  • TI-2022-16181 PRTG Network Monitor through 22.2.77.2204 does not prevent custom input for a device’s… CVSS 3.1MEDIUM 5.3
  • TI-2020-09265 PRTG Network Monitor before 20.1.57.1745 allows remote unauthenticated attackers to… CVSS 3.1MEDIUM 5.3
  • TI-2020-08308 A webserver component in Paessler PRTG Network Monitor 19.2.50 to PRTG 20.1.56 allows… CVSS 3.1CRITICAL 9.8
See all 38 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences