CVE-2021-42311
Microsoft Defender for IoT Remote Code Execution Vulnerability
Microsoft Defender for IoT Remote Code Execution Vulnerability
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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Defender for IoT Remote Code Execution Vulnerability
Microsoft Defender for IoT Remote Code Execution Vulnerability
- Record
CVE-2021-42311- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-29286
Microsoft Defender for IoT Remote Code Execution Vulnerability
- Record
EUVD-2021-29286- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-p693-2vfq-fpvw
Microsoft Defender for IoT Remote Code Execution Vulnerability This CVE ID is unique from CVE...
Microsoft Defender for IoT Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-41365, CVE-2021-42310, CVE-2021-42313, CVE-2021-42314, CVE-2021-42315, CVE-2021-43882, CVE-2021-43889.
- Record
GHSA-p693-2vfq-fpvw- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-89, CWE-94
- Updated
- 2026-11-02
NVD
Microsoft Defender for IoT Remote Code Execution Vulnerability
- Record
CVE-2021-42311- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-89
- Updated
- 2026-11-02
Affected products
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.
In short
CVE-2021-42311 is a critical vulnerability (CVSS 10.0) in Microsoft Defender For Iot, published December 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.42%, the 91st percentile. No source names a fixed version.