CVE-2021-37605
In the Microchip MiWi v6.5 software stack, there is a possibility of frame counters being being...
CVE-2021-37605 is a high vulnerability (CVSS 7.5) in Microchip Miwi, published August 5, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.28%, the 70th percentile. No source names a fixed version.
- Severity
- 7.5 HighCVSS 3.1, NVD
- Exploit chance
- 1.28%EPSS, 70th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
In version 6.5 Microchip MiWi software and all previous versions including legacy products, the stack is validating only two out of four Message Integrity Check (MIC) bytes.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
Affected products
What each source reports
NVD Score used
In version 6.5 Microchip MiWi software and all previous versions including legacy products, the stack is validating only two out of four Message Integrity Check (MIC) bytes.
- Record
CVE-2021-37605- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-670
- Updated
- 2026-11-02
CVE ListNo score
In version 6.5 Microchip MiWi software and all previous versions including legacy products, the stack is validating only two out of four Message Integrity Check (MIC) bytes.
- Record
CVE-2021-37605- Updated
- 2026-11-02
EUVDEUVD-2021-24163No score
In version 6.5 Microchip MiWi software and all previous versions including legacy products, the stack is validating only two out of four Message Integrity Check (MIC) bytes.
- Record
EUVD-2021-24163- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-22wm-6r58-545p
In the Microchip MiWi v6.5 software stack, there is a possibility of frame counters being being...
In the Microchip MiWi v6.5 software stack, there is a possibility of frame counters being being validated / updated prior to message authentication.
- Record
GHSA-22wm-6r58-545p- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-863
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
microchip.com/product-change-notifications
ww1.microchip.com/downloads/en/DeviceDoc/asf-release-notes-3.50.0.100-readme.pdf
nvd.nist.gov/vuln/detail/CVE-2021-37605
github.com/advisories/GHSA-22wm-6r58-545p