What is CVE-2019-0703?

CVE-2019-0703 is a vulnerability in Microsoft Windows. Published 2019-04-08.

Is CVE-2019-0703 known to be exploited?

Yes. CVE-2019-0703 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.

Vulnerability in Microsoft Windows

CVE-2019-0703

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.

EPSS: 0.192 (95.5th percentile) — read the EPSS interpretation.

Affected products

Microsoft Windows — versions 7 for 32-bit Systems Service Pack 1, 7 for x64-based Systems Service Pack 1, 8.1 for 32-bit systems
Microsoft Windows Server — versions 2008 R2 for x64-based Systems Service Pack 1 (Core installation), n/a

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-05-23. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-06-13.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0703 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2019-0703?: CVE-2019-0703 is a vulnerability in Microsoft Windows. Published 2019-04-08.
Is CVE-2019-0703 known to be exploited?: Yes. CVE-2019-0703 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.