CVE-2019-0703VulnerabilityPublished 05/23/2022Updated 10/24/2026

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

Affects Microsoft WindowsSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 05/23/2022
KEV deadline: 06/13/2022
EPSS: 9.4% chance of exploitation in 30 days – higher than 95% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2019-0703 (opens in a new tab)

Description

CVE-2019-0703 is an information disclosure vulnerability in the Microsoft Windows SMB Server. It arises from the way the SMB Server handles certain requests, potentially allowing unauthorized disclosure of information from the server. This vulnerability has been exploited in the wild. No specific affected versions or patch information is provided in the available data.

Summary

This vulnerability involves an information disclosure flaw in the Microsoft Windows SMB Server's handling of specific requests. Exploitation could lead to unauthorized access to sensitive information on the affected server. The vulnerability has been observed in active exploitation campaigns. However, explicit details on affected Windows versions or remediation status are not provided in the input data.

Impact

Successful exploitation of this vulnerability can result in unauthorized disclosure of information from the Windows SMB Server. This could potentially aid attackers in further attacks or reconnaissance. The vulnerability is known to be exploited in the wild, indicating active threat usage.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor Microsoft advisories for updates and apply any available security updates promptly.

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 11:41:06 UTC

References

Related threats