CVE-2021-43892

Name: CVE-2021-43892
Creator: NVD / NIST
Published: 2021-12-15T15:15:11.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 2.85%

Last modified Jun 17, 2026

CVE-2021-43892 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. Microsoft BizTalk ESB Toolkit Spoofing Vulnerability. EPSS estimates a 2.85% chance of exploitation in the next 30 days.

Description

Microsoft BizTalk ESB Toolkit Spoofing Vulnerability

Metrics

CVSS 3.1

7.4/10

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

EPSS Probability

2.85%

84.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Microsoft	Biztalk Esb Toolkit	2.2
Microsoft	Biztalk Esb Toolkit	2.3
Microsoft	Biztalk Esb Toolkit	2.4

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43892Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43892Patch, Vendor Advisory

Timeline

Published: Dec 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43892?

Microsoft BizTalk ESB Toolkit Spoofing Vulnerability

How severe is CVE-2021-43892?

CVE-2021-43892 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 2.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43892?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43892?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST