CVE-2021-27941

low-risk
Published 2021-05-06

Unconstrained Web access to the device's private encryption key in the QR code pairing mode in the eWeLink mobile application (through 4.9.2 on Android and through 4.9.1 on iOS) allows a physically proximate attacker to eavesdrop on Wi-Fi credentials and other sensitive information by monitoring the Wi-Fi spectrum during a device pairing process.

Do I need to act?

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0.05% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.6/10 Medium
PHYSICAL / LOW complexity

Affected Products (2)

Ewelink
Ewelink

Affected Vendors

Coolkit

References (6)

Product https://apps.apple.com/us/app/ewelink-smart-home/id1035163158
Third Party Advisory https://github.com/salgio/eWeLink-QR-Code
Product https://play.google.com/store/apps/details?id=com.coolkit&hl=en_US
Product https://apps.apple.com/us/app/ewelink-smart-home/id1035163158
Third Party Advisory https://github.com/salgio/eWeLink-QR-Code
Product https://play.google.com/store/apps/details?id=com.coolkit&hl=en_US
23
/ 100
low-risk
Severity 16/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 7/34 · Low