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Microsoft · SMBv1 server

CVE-2017-0148

Microsoft SMBv1 Server Remote Code Execution Vulnerability

Exploited in attacks Used by ransomware High 8.1 Attack chance: 99.4%
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What it is

The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0143, CVE-2017-0144, CVE-2017-0145, and CVE-2017-0146.

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

What to do

Apply updates per vendor instructions.

Deadline for US federal agencies: April 27, 2022

Added to the CISA list
April 6, 2022
Published
March 17, 2017
Severity
High 8.1 CVSS 3.1
Chance of attacks in the next 30 days (EPSS)
99.4% in the top 0.1% of all known vulnerabilities
Weakness
CWE-20
More details
NVD · CVE.org · CISA
All references (10)

More exploited flaws from Microsoft

AddedVulnerabilityProductSeverityAttack chance
May 24, 2022Windows SMBv1 Information DisclosureCVE-2017-0147used by ransomwareSMBv1 serverHigh 7.599.7%
Oct 13, 2026Command InjectionCVE-2026-96951WindowsHigh 8.89.8%
Sep 25, 2026Code InjectionCVE-2026-65660SharePointHigh 8.88.2%
Sep 8, 2026Link FollowingCVE-2026-81963WindowsHigh 7.80.4%
Sep 8, 2026Heap-Based Buffer OverflowCVE-2026-85880WindowsHigh 7.80.4%
Aug 26, 2026Remote Code ExecutionCVE-2019-1068SQL ServerHigh 8.857%
Aug 18, 2026Double FreeCVE-2026-33824Internet Key Exchange (IKE) Service ExtensionsCritical 9.877%
Aug 18, 2026Weak AuthenticationCVE-2026-55040SharePointCritical 9.170%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.