CVE-2021-26638

Name: CVE-2021-26638
Creator: NVD / NIST
Published: 2022-06-23T17:15:11.28+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.35%

Last modified Jun 17, 2026

CVE-2021-26638 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Improper Authentication vulnerability in S&D smarthome(smartcare) application can cause authentication bypass and information exposure. Remote attackers can use this vulerability to take control of the home environment including indoor control.. EPSS estimates a 3.35% chance of exploitation in the next 30 days.

Description

Improper Authentication vulnerability in S&D smarthome(smartcare) application can cause authentication bypass and information exposure. Remote attackers can use this vulerability to take control of the home environment including indoor control.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

3.35%

87.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Xisnd	S\&D Smarthome	<= 3.2.48

References

https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66783Third Party Advisory, VDB Entry
https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66783Third Party Advisory, VDB Entry

Timeline

Published: Jun 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26638?

How severe is CVE-2021-26638?

CVE-2021-26638 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.35% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26638?

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-2021-26638?

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

Scan your code now

Source: NVD / NIST