THREATPORT/VULNERABILITY/CVE-2021-43555
HIGH SEVERITY

CVE-2021-43555

Mydesigner vulnerability

CVSS
7.3
EPSS
38.0%
EPSS pct
98th
Exploited
No known
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.
Affected vendor
Myscada
Affected product
Mydesigner
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
Weakness type (CWE)
Published
2021-11-19

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable with local access, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to low impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 38.0% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2021-43555

  • Confirm whether Myscada Mydesigner is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-43555.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-43555

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