CVE-2021-40457

Name: CVE-2021-40457
Creator: NVD / NIST
Published: 2021-10-13T01:15:09.937+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 1.54%

Last modified Jun 17, 2026

CVE-2021-40457 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability. EPSS estimates a 1.54% chance of exploitation in the next 30 days.

Description

Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability

Metrics

CVSS 3.1

7.4/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

EPSS Probability

1.54%

71.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Microsoft	Dynamics 365	9.0
Microsoft	Dynamics 365	9.1

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40457Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40457Patch, Vendor Advisory

Timeline

Published: Oct 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40457?

Microsoft Dynamics 365 Customer Engagement Cross-Site Scripting Vulnerability

How severe is CVE-2021-40457?

CVE-2021-40457 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40457?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-40457?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST