Is CVE-2021-43882 in the CISA KEV catalog?

No. CVE-2021-43882 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-43882?

CVE-2021-43882 has a CVSS v3 base score of 9.0 (CRITICAL).

What is the EPSS score for CVE-2021-43882?

CVE-2021-43882 has an EPSS score of 2.42% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-43882?

Upgrade defender for iot to 10.5.3 or later.

CVE & CISA-KEV Catalog

CVE-2021-43882

CRITICALEPSS 82th pctl

9.0

CVSS v3

NVD

Description

Microsoft Defender for IoT Remote Code Execution Vulnerability

CWE-295Improper Certificate Validation

How to fix

Remediation Available

defender for iotNVD

Affected:< 10.5.3Fixed in:10.5.3CVE-2021-43882derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.42%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Third-Party Advisory1

zerodayinitiative.com

Related Vulnerabilities

Other CWE-295 (Improper Certificate Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-4000	Low	3.7	100%	-	Fix
CVE-2020-0601	High	8.1	89%	KEV	Fix
CVE-2009-3555	Critical	9.8	87%	-	Fix
CVE-2022-26923	High	8.8	83%	KEV	Fix
CVE-2023-27823	Critical	9.8	53%	-	-
CVE-2022-42979	High	8.8	24%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.