CVE-2021-40440
CVE-2021-40440 is a medium-severity vulnerability in Microsoft Dynamics 365 Business Central with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 5.4)
- CVSS v2: 3.5
- EPSS exploit prediction: 1% (56th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Microsoft Dynamics 365 Business Central
- Published:
- Last modified:
Description
Microsoft Dynamics Business Central Cross-site Scripting Vulnerability
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 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2021-40440 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-40440?
- CVE-2021-40440 primarily affects Microsoft Dynamics 365 Business Central. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-40440?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-40440 published?
- CVE-2021-40440 was published on 2021-09-15 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:a:microsoft:dynamics_365_business_central:2020:update_17.10:release_wave_2:*:*:*:*:*
- cpe:2.3:a:microsoft:dynamics_365_business_central:2021:update_18.5:release_wave_1:*:*:*:*:*
More vulnerabilities in Microsoft Dynamics 365 Business Central
- CVE-2024-38225 — High (CVSS 8.8): Microsoft Dynamics 365 Business Central Elevation of Privilege Vulnerability
- CVE-2024-35249 — High (CVSS 8.8): Microsoft Dynamics 365 Business Central Remote Code Execution Vulnerability
- CVE-2022-41127 — High (CVSS 8.5): Microsoft Dynamics NAV and Microsoft Dynamics 365 Business Central (On Premises) Remote Code Execution Vulnerability
- CVE-2024-43460 — High (CVSS 8.1): Improper authorization in Dynamics 365 Business Central resulted in a vulnerability that allows an authenticated…
- CVE-2024-21380 — High (CVSS 8.0): Microsoft Dynamics Business Central/NAV Information Disclosure Vulnerability
- CVE-2021-34474 — High (CVSS 8.0): Dynamics Business Central Remote Code Execution Vulnerability
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