CVE-2021-42022Network attack vector

Authenticated file disclosure via download path traversal

Published Dec 14, 2021 · Updated Aug 4, 2024

Path traversal in Siemens SIMATIC eaSie PCS 7 Skill Package before 21.00 SP3 allows remote authenticated users to read server files. The file-download function fails to neutralize special pathname elements, allowing a crafted path to escape its restricted server directory. The function is disabled by default, and exploitation discloses files readable by the service without altering them.

CVSS severity6.5
Medium
EPSS probability0.91%
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 Siemens SIMATIC eaSie PCS 7 Skill Package before 21.00 SP3 allows remote authenticated users to read server files. The file-download function fails to neutralize special pathname elements, allowing a crafted path to escape its restricted server directory. The function is disabled by default, and exploitation discloses files readable by the service without altering them.

The record

CVE
CVE-2021-42022
Published
Dec 14, 2021
Updated
Aug 4, 2024
Vendor
Siemens
Product
SIMATIC eaSie PCS 7 Skill Package
Classifications
CWE-22, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 versions < V21.00 SP3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC eaSie PCS 7 Skill Packageversion=All versions < V21.00 SP3

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:P/I:N/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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