CVE-2021-43555

Code execution via project archive path traversal

Published Nov 19, 2021 · Updated Sep 17, 2024

Path traversal in mySCADA Technologies myDESIGNER 8.20.0 and earlier allows attackers to execute code via an imported project file. The import handler does not reject relative traversal entries before extracting project contents, so files are written outside the intended directory. A local user must import the crafted project; traversal entries can plant or overwrite arbitrary files and cause code execution.

CVSS severity7.3
High
EPSS probability38.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in mySCADA Technologies myDESIGNER 8.20.0 and earlier allows attackers to execute code via an imported project file. The import handler does not reject relative traversal entries before extracting project contents, so files are written outside the intended directory. A local user must import the crafted project; traversal entries can plant or overwrite arbitrary files and cause code execution.

The record

CVE
CVE-2021-43555
Published
Nov 19, 2021
Updated
Sep 17, 2024
Vendor
mySCADA Technologies
Product
myDESIGNER
Classifications
CWE-22, CWE-23, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 19, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All <=8.20.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

mySCADA Technologies · myDESIGNERversion=All <=8.20.0

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.3ICS-CERTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-23Relative Path Traversal
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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