Microsoft SMBv1 Remote Code Execution Vulnerability
Microsoft · SMBv1
The SMBv1 server in Microsoft Windows (including Vista SP2, Windows Server 2008 and 2012 variants, Windows 7, 8.1, RT 8.1, 10, and Windows Server 2016) contains an improper input validation flaw in how it handles SMB traffic. An attacker with network access to the affected server, who can authenticate as a low-privileged user and does not require any user interaction, can send crafted packets to execute arbitrary code on the target.
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-2017-0146, and CVE-2017-0148.
- Exploited
- Yes, in CISA KEV
- Reports
- 0
- Tactics
- 2/15
How an attack unfolds
Based on MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. mappings. Select a step to see the evidence.Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 3 days before it was disclosed. Public exploit code (Metasploit) was available 3 days before disclosure.
- Disclosedday 0
- Added to CISA KEVknown ransomware use; EU database agrees+5 yrs
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
2 TechniqueOne specific attacker behaviour in MITRE ATT&CK, such as T1190 “Exploit Public-Facing Application”. IDs with a dot, like T1059.004, are sub-techniques., grouped by TacticThe attacker’s goal at a stage of an attack in MITRE ATT&CK, such as Initial Access or Persistence. Each technique belongs to one or more tactics. in kill-chain order, 2 cited passages 2ExecutionTA0002
Arbitrary code execution on target
allows remote attackers to execute arbitrary code via crafted packets
Lateral MovementTA0008
Remote exploitation of SMB network service
allows remote attackers to execute arbitrary code via crafted packets
Detection
0 rules for this CVE · 110 general rules for its techniquesRules for this CVE
0Sigma ruleAn open, vendor-neutral detection rule for log data. Security teams convert Sigma rules into searches for their own SIEM. that reference CVE-2017-0145 directly.CVE-specific rules are not available in this build. Search SigmaHQ ↗
General rules for this CVE’s techniques
These detect the technique in general, not this specific vulnerability.
Exploitation of Remote ServicesT121015 general rules
- Zerologon Exploitation Using Well-known Toolscriticalstable
- Audit CVE Eventcriticaltest
- WannaCry Ransomware Activitycriticaltest
- OMIGOD HTTP No Authentication RCE - CVE-2021-38647highstable
- Exploitation Attempt Of CVE-2020-1472 - Execution of ZeroLogon PoChightest
- Exploitation Attempt Of CVE-2023-46214 Using Public POC Codehightest
- HackTool - SharpWSUS/WSUSpendu Executionhightest
- Possible Exploitation of Exchange RCE CVE-2021-42321hightest
Command and Scripting InterpreterT105995 general rules
- HackTool - Sliver C2 Implant Activity Patterncriticaltest
- Lazarus Group Activitycriticaltest
- REvil Kaseya Incident Malware Patternscriticaltest
- Turla Group Lateral Movementcriticaltest
- Windows Defender AMSI Trigger Detectedhighstable
- Windows Defender Threat Detectedhighstable
- Abusable DLL Potential Sideloading From Suspicious Locationhightest
- Add Insecure Download Source To Wingethightest
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
What security researchers reported
Not named in any threat report yetAlso mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- Actively_Exploited_Kev | Oct 22, 202621 Oct 2026
- 44 more on OTX