What’s Vulnerable › Vulnerabilities

CVE-2021-40440: Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

• Severity: low (CVSS 3.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-15 · updated 2026-08-10
• Weakness: CWE-79

Description

Microsoft Dynamics Business Central Cross-site Scripting Vulnerability

Affected products

• Microsoft Dynamics 365 Business Central 2023 Release Wave 1: 2020-update_17.10, 2021-update_18.5
• Microsoft Dynamics 365 Business Central 2020 Release Wave 2 – Update 17.10: from 17.0.0.0 before 17.0.29460 — fixed in 17.0.29460
• Microsoft Dynamics 365 Business Central 2021 Release Wave 1 - Update 18.5: from 18.0.0.0 before 18.0.29486 — fixed in 18.0.29486

How to fix

Upgrade to a fixed version: Microsoft Dynamics 365 Business Central 2020 Release Wave 2 – Update 17.10 17.0.29460; Microsoft Dynamics 365 Business Central 2021 Release Wave 1 - Update 18.5 18.0.29486. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40440
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40440

Get alerted when CVE-2021-40440 or the next vulnerability affects your stack