# CVE-2019-0703: Microsoft Windows SMB Information Disclosure Vulnerability

Source: https://junglewise.ai/threats/cve-2019-0703-microsoft-windows-smb-information-disclosure-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-05-23. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2019-0703 · Severity: critical · CVSS 6.5 · Exploited in the wild · Published 2022-05-23

An information disclosure vulnerability exists in the Windows SMB Server when handling specific requests. An authenticated attacker could exploit this to leak sensitive information from the server.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2019-0703 exploited in the wild?** Yes. CVE-2019-0703 is known to be exploited in the wild, first recorded on 23 May 2022. Treat it as urgent.

**How severe is CVE-2019-0703?** Critical severity, with a CVSS score of 6.5, published 23 May 2022.

**Which products and versions are affected?** Microsoft Windows 7 Service Pack 1; Microsoft Windows 8.1; Microsoft Windows RT 8.1; Microsoft Windows 10 1507, 1607, 1703, 1709, 1803, 1809; and 4 more.

**Is there a fix for CVE-2019-0703?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2019-0703 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2019-0703?** Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Windows 7 Service Pack 1
- Microsoft Windows 8.1
- Microsoft Windows RT 8.1
- Microsoft Windows 10 1507, 1607, 1703, 1709, 1803, 1809
- Microsoft Windows Server 2008 Service Pack 2, R2 Service Pack 1
- Microsoft Windows Server 2012 R2
- Microsoft Windows Server 2016 1709, 1803
- Microsoft Windows Server 2019

## Timeline

- 2019-04-09: disclosed: Initial analysis by NIST
- 2022-05-23: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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