CVE-2021-22738Network attack vector

Unauthorized access via weak cryptography

Published May 26, 2021 · Updated Aug 3, 2024

Broken cryptography in Schneider Electric homeLYnk and spaceLYnk V2.60 and prior allows remote attackers unauthorized access after brute force. The advisory does not identify the cryptographic component or operation, reporting only that a broken or risky algorithm permits credential discovery. Remote unauthenticated access requires successful brute-force discovery of credentials and can expose, alter, or disrupt device functions.

CVSS severity5.6
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken cryptography in Schneider Electric homeLYnk and spaceLYnk V2.60 and prior allows remote attackers unauthorized access after brute force. The advisory does not identify the cryptographic component or operation, reporting only that a broken or risky algorithm permits credential discovery. Remote unauthenticated access requires successful brute-force discovery of credentials and can expose, alter, or disrupt device functions.

The record

CVE
CVE-2021-22738
Published
May 26, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-327, T1110
Attack vector
network
Privileges
unauthenticated

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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.6Schneider ElectricCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1110Brute Force

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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