CVE-2021-43892
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
- Record
CVE-2021-43892- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-30754
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
- Record
EUVD-2021-30754- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4hpv-f46m-r2m2 No score
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
- Record
GHSA-4hpv-f46m-r2m2- Updated
- 2026-11-02
NVD
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
- Record
CVE-2021-43892- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - 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-2021-43892 is a high vulnerability (CVSS 7.4) in Microsoft Biztalk Esb Toolkit, published December 15, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.02%, the 87th percentile. No source names a fixed version.