CVE-2021-37604 json
In version 6.5 of Microchip MiWi software and all previous versions including legacy products, there is a possibility of frame counters bei…
published 2021-08-05 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-24162
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
1.23% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-670 Always-Incorrect Control Flow Implementation
References
-
microchip.com
/product-change-notifications/#/
vendor-advisory
-
microchip.com
/en-us/products/wireless-connectivity/sub-ghz/miwi-protocol
vendor-advisory
-
ww1.microchip.com
/downloads/en/DeviceDoc/asf-release-notes-3.50.0.100-readme.pdf
release-notes, vendor-advisory
-
microchip.com
/en-us/development-tools-tools-and-software/libraries-code-examples-and-more/advanced-software-framework-for-s
vendor-advisory
-
microchip.com
/en-us/products/wireless-connectivity/software-vulnerability-response/miwi-software-vulnerability
vendor-advisory
Sources
- CVE List CVE-2021-37604
- NVD CVE-2021-37604
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