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CVE-2021-37605

25
FAUCET Score

CVE-2021-37605 describes a vulnerability in Microchip MiWi software, version 6.5 and all previous versions, where the Message Integrity Check (MIC) validation is incomplete, checking only two of four bytes. This high-severity vulnerability (CVSS 7.5) allows an unauthenticated attacker to achieve high integrity impact over the network with low attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
6.5CPE matchmatch criteria
cpe:2.3:a:microchip:miwi:6.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.28%
Probability of exploitation in next 30 days
EPSS Percentile
67.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0128 is in the 47th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ww1.microchip.com / downloads/en/DeviceDoc/asf-release-notes-3.50.0.100-readme.pdf
Vendor Advisory
ww1.microchip.com / downloads/en/DeviceDoc/asf-release-notes-3.51.0.101-readme.pdf
Release NotesVendor Advisory
microchip.com / en-us/development-tools-tools-and-software/libraries-code-examples-and-more/advanced-software-framework-for-sam-devices
Vendor Advisory
microchip.com / en-us/products/wireless-connectivity/software-vulnerability-response/miwi-software-vulnerability
Vendor Advisory
microchip.com / en-us/products/wireless-connectivity/sub-ghz/miwi-protocol
Vendor Advisory
microchip.com / product-change-notifications
Vendor Advisory