CVE-2021-22734

Name: CVE-2021-22734
Creator: NVD / NIST
Published: 2021-05-26T20:15:09.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 1.00%

Last modified Jun 17, 2026

CVE-2021-22734 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. Improper Verification of Cryptographic Signature vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior which could cause remote code execution when an attacker loads unauthorized code.. EPSS estimates a 1.00% chance of exploitation in the next 30 days.

Description

Improper Verification of Cryptographic Signature vulnerability exists in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior which could cause remote code execution when an attacker loads unauthorized code.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.00%

58.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-347

Affected Software

Vendor	Product	Versions
Schneider-Electric	Spacelynk Firmware	<= 2.6.0
Schneider-Electric	Homelynk Firmware	<= 2.6.0

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-130-04Vendor Advisory
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-130-04Vendor Advisory

Timeline

Published: May 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22734?

How severe is CVE-2021-22734?

CVE-2021-22734 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.00% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22734?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22734?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST