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Vulnerability record · CVE-2021-43555 · published 19 November 2021

CVE-2021-43555: Myscada mydesigner relative path traversal vulnerability

Myscada · Mydesigner

mySCADA myDESIGNER Versions 8.20.0 and prior fails to properly validate contents of an imported project file, which may make the product vulnerable to a path traversal payload. This vulnerability may allow an attacker to plant files on the file system in arbitrary locations or overwrite existing files, resulting in remote code execution.

7.8 CVSS 3.1 High EPSS 38% · top 1.5% CWE-23 · Relative path traversalCWE-22 · Path traversal
7.8CVSS 3.1 base score, v2 6.8
38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

mySCADA myDESIGNER Versions 8.20.0 and prior fails to properly validate contents of an imported project file, which may make the product vulnerable to a path traversal payload. This vulnerability may allow an attacker to plant files on the file system in arbitrary locations or overwrite existing files, resulting in remote code execution.

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

Affected products

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

References

LinkTags
https://us-cert.cisa.gov/ics/advisories/icsa-21-313-04 PatchThird Party AdvisoryUS Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-21-313-04 PatchThird Party AdvisoryUS Government Resource

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Related vulnerabilities

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

7.8CVE-2021-41578Myscada mydesigner path traversal vulnerabilitymySCADA myDESIGNER 8.20.0 and below allows Directory Traversal attacks when importing project files. If an attacker can trick a victim into importing…EPSS 11%6.7CVE-2026-34926Trend Micro Apex One on-premise server directory traversal enables agent code injectionA relative path traversal (CWE-23) in the Apex One on-premise server lets an attacker who already holds administrative credentials on the server modi…KEVEPSS 0.54%analysed7.3CVE-2024-27199JetBrains TeamCity path traversal enables limited admin actionsJetBrains TeamCity before 2023.11.4 is vulnerable to relative path traversal that lets an unauthenticated remote party perform limited administrative…KEVEPSS 100%analysed9.8CVE-2025-64446FortiWeb relative path traversal allows admin command executionFortiWeb contains a relative path traversal flaw (CWE-23) reachable through crafted HTTP or HTTPS requests. Successful exploitation lets an attacker …KEVEPSS 92%analysed7.5CVE-2020-5410Spring Cloud Config Server path traversal exposes arbitrary filesSpring Cloud Config Server versions 2.2.x before 2.2.3, 2.1.x before 2.1.9, and older unsupported releases serve arbitrary configuration files via th…KEVEPSS 96%analysed9.8CVE-2021-40870Aviatrix Controller unauthenticated file upload leads to RCEAviatrix Controller 6.x before 6.5-1804.1922 allows unrestricted upload of a dangerous file type, and directory traversal lets an unauthenticated att…KEVEPSS 93%analysed

Source: NIST National Vulnerability Database (record CVE-2021-43555), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.