CVE-2019-0703
Published: May 23, 2022
Official Description
An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, which could lead to information disclosure from the server.
CISA KEV Advisory
Microsoft Windows SMB Information Disclosure Vulnerability
An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, which could lead to information disclosure from the server.
Apply updates per vendor instructions.
Risk Analysis
A vulnerability in the Windows SMB Server can lead to information disclosure due to how it handles specific requests. This high-severity flaw has an EPSS score of 0.20019, suggesting a notable probability of exploitation, and CISA has confirmed its active exploitation.
This vulnerability is actively exploited in the wild and is included in CISA's KEV catalog, confirming its real-world impact.
Ensure that Windows SMB Server is updated with the latest security patches to prevent information disclosure. Review and harden SMB configurations to limit exposure.
Technical Analysis
CVE-2019-0703 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2019-0703 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-0703 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1