CVE-2019-0703

Microsoft Windows SMB Information Disclosure Vulnerability

Medium 6.5
Exploited: added to CISA KEV 23 May 2022

Description

An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-0704, CVE-2019-0821.

Key facts

Published: 8 Apr 2019
Last changed: 21 Oct 2025
Assigned by: microsoft
KEV added: 23 May 2022
KEV fix due: 13 Jun 2022
EPSS: 9.385% likely to be exploited in the next 30 days, higher than 95.485% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: no; Technical impact: partial

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

6.5CVSS 3.1, Mediumfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

What to do

Apply updates per vendor instructions.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
Microsoft	Windows	7 for 32-bit Systems Service Pack 1 (affected) 7 for x64-based Systems Service Pack 1 (affected) 8.1 for 32-bit systems (affected) 8.1 for x64-based systems (affected) RT 8.1 (affected) 10 for 32-bit Systems (affected) 10 for x64-based Systems (affected) 10 Version 1607 for 32-bit Systems (affected) 10 Version 1607 for x64-based Systems (affected) 10 Version 1703 for 32-bit Systems (affected) 10 Version 1703 for x64-based Systems (affected) 10 Version 1709 for 32-bit Systems (affected) 10 Version 1709 for x64-based Systems (affected) 10 Version 1803 for 32-bit Systems (affected) 10 Version 1803 for x64-based Systems (affected) 10 Version 1803 for ARM64-based Systems (affected) 10 Version 1809 for 32-bit Systems (affected) 10 Version 1709 for ARM64-based Systems (affected)
Microsoft	Windows Server	2008 R2 for x64-based Systems Service Pack 1 (Core installation) (affected) n/a (affected)

Timeline

8 Apr 2019 Published
23 May 2022 CVE-2019-0703 added to CISA KEV
23 May 2022 Added to the CISA KEV catalogue

References

portal.msrc.microsoft.comx_refsource_CONFIRM