CVE-2021-22740Network attack vector

Data disclosure via unauthorized file upload

Published May 26, 2021 · Updated Aug 3, 2024

Information exposure in Schneider Electric homeLYnk and spaceLYnk 2.60 and earlier allows remote authenticated users to read data. An unauthorized file upload triggers the exposure, but Schneider Electric has not published the affected upload handler, file format, or disclosure operation. The vendor assessment requires network access, high privileges, user interaction, and an attacker-controlled upload; the reported consequence is confidentiality loss only.

CVSS severity4.2
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in Schneider Electric homeLYnk and spaceLYnk 2.60 and earlier allows remote authenticated users to read data. An unauthorized file upload triggers the exposure, but Schneider Electric has not published the affected upload handler, file format, or disclosure operation. The vendor assessment requires network access, high privileges, user interaction, and an attacker-controlled upload; the reported consequence is confidentiality loss only.

The record

CVE
CVE-2021-22740
Published
May 26, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 26, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.2Schneider ElectricCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

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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