ACTIVELY EXPLOITED

CVE-2017-0147: Microsoft Windows SMBv1 Information Disclosure Vulnerability

Facts
VendorMicrosoft
ProductSMBv1 server
Actively exploitedYes
Added to CISA KEV24 May 2022
CISA federal deadline14 Jun 2022
Ransomware useKnown
Weakness (CWE)CWE-200

Required action (CISA's text)

Apply updates per vendor instructions.

Description (NVD)

The SMBv1 server in Microsoft Windows allows remote attackers to obtain sensitive information from process memory via a crafted packet.

SOURCES

Other Microsoft flaws

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.