CVE-2021-43892
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
HIGH
7.4
CVSS Score
Published: December 15, 2021 at 02:15 PM UTC
Updated: June 17, 2026 at 04:11 AM UTC
1 product affected across 1 vendorBiztalk Esb Toolkit
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Severity
HIGH7.4
Exploit prediction
EPSS 3%
SSVC
No known exploit
Description
Microsoft BizTalk ESB Toolkit Spoofing Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 2.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.4, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43892SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.4HIGHmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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