CVE-2021-40457
Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting 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 Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
- Record
CVE-2021-40457- 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:F/RL:O/RC:C - Updated
- 2026-11-02
EUVDEUVD-2021-27634
Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
- Record
EUVD-2021-27634- 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:F/RL:O/RC:C - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q8m2-7cfj-gxf6
Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
- Record
GHSA-q8m2-7cfj-gxf6- 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 - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability
- Record
CVE-2021-40457- 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 3.1
- 6.1 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- 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-2021-40457 is a high vulnerability (CVSS 7.4) in Microsoft Dynamics 365, published October 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.63%, the 76th percentile. No source names a fixed version.