How severe is CVE-2022-21891?

CVE-2022-21891 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2022-21891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-21891?

CVE-2022-21891 affects Microsoft Dynamics 365 Sales. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-21891?

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-2022-21891 published?

CVE-2022-21891 was published on 2022-01-11 and last updated on 2026-06-17.

CVE-2022-21891

CVE-2022-21891 is a high-severity vulnerability in Microsoft Dynamics 365 Sales with a CVSS 3.x base score of 7.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.6)
CVSS v2: 4.3
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Dynamics 365 Sales
Published: 2022-01-11
Last modified: 2026-06-17

Description

Microsoft Dynamics 365 (on-premises) Spoofing Vulnerability

Frequently asked questions

What is CVE-2022-21891?: Microsoft Dynamics 365 (on-premises) Spoofing Vulnerability
How severe is CVE-2022-21891?: CVE-2022-21891 has a CVSS 3.x base score of 7.6, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2022-21891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-21891?: CVE-2022-21891 affects Microsoft Dynamics 365 Sales. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-21891?: 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-2022-21891 published?: CVE-2022-21891 was published on 2022-01-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:dynamics_365_sales:-:*:*:*:*:*:*:*

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