CVE-2021-37604

In version 6.5 of Microchip MiWi software and all previous versions including legacy products, there is a possibility of frame counters being validated/updated prior to the message authentication. With this vulnerability in place, an attacker may increment the incoming frame counter values by injecting messages with a sufficiently large frame counter value and invalid payload. This results in denial of service/valid packets in the network. There is also a possibility of a replay attack in the stack.

• CWE-670

• https://ww1.microchip.com/downloads/en/DeviceDoc/asf-release-notes-3.50.0.100-readme.pdfRelease Notes, Vendor Advisory
• https://www.microchip.com/en-us/development-tools-tools-and-software/libraries-code-examples-and-more/advanced-software-framework-for-sam-devices#DownloadsVendor Advisory
• https://www.microchip.com/en-us/products/wireless-connectivity/software-vulnerability-response/miwi-software-vulnerabilityVendor Advisory
• https://www.microchip.com/en-us/products/wireless-connectivity/sub-ghz/miwi-protocolVendor Advisory
• https://www.microchip.com/product-change-notifications/#/Vendor Advisory
• https://ww1.microchip.com/downloads/en/DeviceDoc/asf-release-notes-3.50.0.100-readme.pdfRelease Notes, Vendor Advisory
• https://www.microchip.com/en-us/development-tools-tools-and-software/libraries-code-examples-and-more/advanced-software-framework-for-sam-devices#DownloadsVendor Advisory
• https://www.microchip.com/en-us/products/wireless-connectivity/software-vulnerability-response/miwi-software-vulnerabilityVendor Advisory
• https://www.microchip.com/en-us/products/wireless-connectivity/sub-ghz/miwi-protocolVendor Advisory
• https://www.microchip.com/product-change-notifications/#/Vendor Advisory

Published

Aug 5, 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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