CVE-2021-22720Public exploitNetwork attack vector

Sensitive file disclosure via PROJECT RESTORE traversal

Published Apr 13, 2021 · Updated Aug 3, 2024

Path traversal in Schneider Electric C-Bus Toolkit 1.15.7 and earlier allows remote attackers to read sensitive host files. The C-Gate 2 Service PROJECT RESTORE command uses a user-supplied path in file operations without ensuring that it remains in the project directory. The command interface requires authentication, but ZDI reports that authentication can be bypassed; disclosure is limited by the service account's file access.

CVSS severity6.5
Medium
EPSS probability30.53%
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 Schneider Electric C-Bus Toolkit 1.15.7 and earlier allows remote attackers to read sensitive host files. The C-Gate 2 Service PROJECT RESTORE command uses a user-supplied path in file operations without ensuring that it remains in the project directory. The command interface requires authentication, but ZDI reports that authentication can be bypassed; disclosure is limited by the service account's file access.

The record

CVE
CVE-2021-22720
Published
Apr 13, 2021
Updated
Aug 3, 2024
Vendor
Schneider Electric
Product
C-Bus Toolkit
Classifications
CWE-22, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=C-Bus Toolkit V1.15.7 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Schneider Electric · C-Bus Toolkitversion=C-Bus Toolkit V1.15.7 and prior

Published CVSS scores

6.5Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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.

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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 exploitPublished

Weakness, pattern, technique

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

Public exploit references

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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