CVE-2021-43892

CVE-2021-43892 is a high-severity vulnerability in Microsoft Biztalk Esb Toolkit with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Microsoft BizTalk ESB Toolkit Spoofing Vulnerability

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 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-43892 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43892?
CVE-2021-43892 primarily affects Microsoft Biztalk Esb Toolkit. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-43892?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43892 published?
CVE-2021-43892 was published on 2021-12-15 and last updated on 2026-06-17.

References

Affected products (3)