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CVE-2021-26638

31
FAUCET Score

CVE-2021-26638 is an Improper Authentication vulnerability affecting the S&D smarthome (smartcare) application, allowing for authentication bypass and information exposure. This critical vulnerability, with a CVSS score of 9.8, enables remote attackers to gain full control over the home environment, including indoor controls, without requiring any user interaction or prior authentication. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential for complete compromise of smart home systems makes this a significant risk.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.2.48CPE matchmatch criteria
cpe:2.3:a:xisnd:s\&d_smarthome:*:*:*:*:*:android:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.1
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.43%
Probability of exploitation in next 30 days
EPSS Percentile
87.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0343 is in the 80th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

krcert.or.kr / krcert/secNoticeView.do
Third Party AdvisoryVDB Entry