CVE-2021-26638
CWE-287Published: June 23, 2022· Updated: Jun 17, 2026
Official 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.
Risk Analysis
The S&D smarthome application suffers from an improper authentication vulnerability that allows attackers to bypass security controls. This enables remote unauthorized access to home environment controls.
No public exploit is known, and it is not in the KEV catalog. The vulnerability is remotely exploitable with low complexity.
Contact the vendor for firmware or application updates. Ensure the device is isolated from the public internet using a firewall or VPN.
Technical Analysis
CVE-2021-26638 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-287)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-26638 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts