CVE-2021-40440

Name: CVE-2021-40440
Creator: NVD / NIST
Published: 2021-09-15T12:15:16.367+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2021-40440 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Microsoft Dynamics Business Central Cross-site Scripting Vulnerability. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

Description

Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.93%

56.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions	Update
Microsoft	Dynamics 365 Business Central	2020	Update 17.10
Microsoft	Dynamics 365 Business Central	2021	Update 18.5

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40440Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40440Patch, Vendor Advisory

Timeline

Published: Sep 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-40440?

Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

How severe is CVE-2021-40440?

CVE-2021-40440 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2021-40440?

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-2021-40440?

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

Scan your code now

Source: NVD / NIST