CVE-2022-21891

mediumpriority · track · 18EPSS 0.015 · 74 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.51% (74th) EPSS

CVSS 4.3 · medium

Is it mine?

3 products

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-28

Microsoft Dynamics 365 (on-premises) Spoofing Vulnerability

cvss

Technical severity, 0–10. One row per scoring source.

7.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4–7.6

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 1.4

v3.17.6highAV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.17.6highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17.6highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:Nsecondary · secure@microsoft.com USexploitability 2.3 · impact 4.7

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.6highCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

The CWE weakness classes this flaw belongs to.

Products and version ranges known to be affected.

Vendor and ecosystem advisories describing this.

msrc_CVE-2022-21891Microsoft Dynamics 365 (on-premises) Spoofing Vulnerability2022-01-11csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Other names and identifiers for this entity.

Which sources assert this record, and when.

published 2022-01-11modified 2026-06-17

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.