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CVE-2021-41365

29
FAUCET Score

CVE-2021-41365 is a high-severity Remote Code Execution (RCE) vulnerability affecting Microsoft Defender for IoT. An authenticated attacker can exploit this flaw over the network with low attack complexity, leading to high impacts on confidentiality, integrity, and availability. While the vulnerability has a CVSS score of 8.8 and a FAUCET Risk Score of 71/100, it is not currently listed in CISA's KEV catalog. There is no public exploit code available in Metasploit, Nuclei, or ExploitDB, and community discussion and media coverage are limited, with only one article mentioning it as part of a larger Patch Tuesday update.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.5.2CPE matchmatch criteria
cpe:2.3:a:microsoft:defender_for_iot:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.71%
Probability of exploitation in next 30 days
EPSS Percentile
84.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0271 is in the 83rd percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

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

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Defender for IoTFixed in: 10.5.2
View patch

Vendor Advisories (1)

microsoft2021-Dec/CVE-2021-41365Important

Microsoft Defender for IoT Remote Code Execution Vulnerability

Dec 14, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-41365
PatchVendor Advisory
zerodayinitiative.com / advisories/ZDI-21-1595
Third Party Advisory