CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Microsoft SMBv3 Remote Code Execution Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.
Affected products
microsoft: windows 10 1903; microsoft: windows 10 1909; microsoft: windows server 1903; microsoft: windows server 1909
References10
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-… PatchVendor Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-… PatchVendor Advisory
- packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-O… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/156732/Microsoft-Windows-SMB-3.1.… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/157110/SMBv3-Compression-Buffer-O… ExploitThird Party AdvisoryVDB Entry
- packetstormsecurity.com/files/156731/CoronaBlue-SMBGhost-Micros… Third Party AdvisoryVDB Entry
- packetstormsecurity.com/files/156980/Microsoft-Windows-10-SMB-3… Third Party AdvisoryVDB Entry
- packetstormsecurity.com/files/157901/Microsoft-Windows-SMBGhost… Third Party AdvisoryVDB Entry
- packetstormsecurity.com/files/158054/SMBleed-SMBGhost-Pre-Authe… Third Party AdvisoryVDB Entry
Metrics
- CVSS 3.1
-
10.0
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 100% percentile: 100 · as of 11 November 2026
- CWE
- CWE-119
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