ACTIVELY EXPLOITED

CVE-2017-0148: Microsoft SMBv1 Server Remote Code Execution Vulnerability

Facts
VendorMicrosoft
ProductSMBv1 server
Actively exploitedYes
Added to CISA KEV6 Apr 2022
CISA federal deadline27 Apr 2022
Ransomware useKnown
Weakness (CWE)CWE-20

Required action (CISA's text)

Apply updates per vendor instructions.

Description (NVD)

The SMBv1 server in Microsoft allows remote attackers to execute arbitrary code via crafted packets.

SOURCES

Other Microsoft flaws

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