Microsoft Dynamics 365 Business Central Remote Code Execution Vulnerability

published 2021-07-14 5 y ago modified 2026-08-10 2 mo ago also EUVD-2021-21129

cvss: 8.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.2%; EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits: 0; none known

Patch / fix

fixed in 3 links 2

Microsoft Microsoft Dynamics 365 Business Central 2020 Release Wave 1 - Update 16.14 16.0.27253
Microsoft Microsoft Dynamics 365 Business Central 2020 Release Wave 2 - Update 17.8 17.0.27235
Microsoft Microsoft Dynamics 365 Business Central 2021 Release Wave 1 - Update 18.3 18.0.27469

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-02-26)

Exploit prediction

2.17% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.0	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA	3.1	8.0	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

Microsoft Microsoft Dynamics 365 Business Central 2020 Release Wave 1 - Update 16.14
Microsoft Microsoft Dynamics 365 Business Central 2020 Release Wave 2 - Update 17.8
Microsoft Microsoft Dynamics 365 Business Central 2021 Release Wave 1 - Update 18.3

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2021-34474
vendor-advisory, patch
portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2021-34474
patch, vendor-advisory

Sources

CVE List CVE-2021-34474
NVD CVE-2021-34474

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary