CVE-2021-27941

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.

• CWE-522

• https://apps.apple.com/us/app/ewelink-smart-home/id1035163158Product, Third Party Advisory
• https://github.com/salgio/eWeLink-QR-CodeThird Party Advisory
• https://play.google.com/store/apps/details?id=com.coolkit&hl=en_USProduct, Third Party Advisory
• https://apps.apple.com/us/app/ewelink-smart-home/id1035163158Product, Third Party Advisory
• https://github.com/salgio/eWeLink-QR-CodeThird Party Advisory
• https://play.google.com/store/apps/details?id=com.coolkit&hl=en_USProduct, Third Party Advisory

Published

May 6, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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