CVE-2020-1018 — Microsoft Dynamics Business Central/NAV Information Disclosure

Executive Summary

An information disclosure vulnerability exists when Microsoft Dynamics Business Central/NAV on-premise does not properly hide the value of a masked field when showing the records as a chart page. The attacker who successfully exploited the vulnerability could see the information that are in a masked field. The security update addresses the vulnerability by updating the rendering engine the Windows client to properly detect masked fields and render the content as masked.

Overview

7.5

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Information Disclosure

Released Apr 14 2020

Last Updated Apr 14 2020

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.06158 — 0.92558 percentile

NVD CVSS 7.5 HIGH — differs from MSRC

CVSS Vector

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

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

EPSS Score

0.06158

probability of exploitation in the next 30 days

0.92558 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

6 affected products

Product	KB Article	Severity	Impact	Restart Required
Dynamics 365 Business Central 2019 Spring Update	`4549677 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Dynamics 365 BC On Premise	`4549676 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Dynamics NAV 2015	`4557700 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Dynamics NAV 2016	`4549673 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Dynamics NAV 2017	`4549674 (Security Update)`	Important	Information Disclosure	Maybe
Microsoft Dynamics NAV 2018	`4549675 (Security Update)`	Important	Information Disclosure	Maybe

Patches

6 patches

Article	Type	Restart
`4549677`	Security Update	Maybe
`4549676`	Security Update	Maybe
`4557700`	Security Update	Maybe
`4549673`	Security Update	Maybe
`4549674`	Security Update	Maybe
`4549675`	Security Update	Maybe

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

None

References

MSRC Advisory MITRE NVD