BizTalk ESB Toolkit
CVE-2021-43892 — Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
Executive Summary
None
Overview
7.4
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Not Found
MS Exploit Likelihood
CVSS Vector
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
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Changed
CONFIDENTIALITY
High
INTEGRITY
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.7
EPSS Score
0.02855
probability of exploitation in the next 30 days
0.84906 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
3 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft BizTalk ESB Toolkit 2.2 | 5009301 (Security Update) |
Important | Spoofing | Maybe |
| Microsoft BizTalk ESB Toolkit 2.3 | 5009301 (Security Update) |
Important | Spoofing | Maybe |
| Microsoft BizTalk ESB Toolkit 2.4 | 5009301 (Security Update) |
Important | Spoofing | Maybe |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
5009301 |
Security Update | Maybe |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Frédéric Tran
References
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