5.4Medium
Microsoft Dynamics 365 Business Central
CVE-2021-40440
Microsoft Dynamics Business Central Cross-site Scripting Vulnerability
What this means for your business
- It affects Microsoft Dynamics 365 Business Central. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, with an ordinary user login, but only after tricking someone into an action such as opening a file or a link.
What to do
- 1Check whether your company or your suppliers run Microsoft Dynamics 365 Business Central, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 5.4 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N- Weakness
- CWE-79
- Assigned by
- secure@microsoft.com
Dates
- Published
- 2021-09-15
- Last modified
- 2026-08-10
- Sources
- NVD
Affected products
- Microsoft Dynamics 365 Business Central2020, 2021
As listed in the NVD configuration data. Not a statement about your estate.