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Fencer Vulns
high 7.1

CVE-2009-3676 in the critical feed json

The SMB client in the kernel in Microsoft Windows Server 2008 R2 and Windows 7 allows remote SMB servers and man-in-the-middle attackers to…

published 2009-11-13 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3651

cvss
7.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
34.6%
EPSS 34.6% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

The SMB client in the kernel in Microsoft Windows Server 2008 R2 and Windows 7 allows remote SMB servers and man-in-the-middle attackers to cause a denial of service (infinite loop and system hang) via a (1) SMBv1 or (2) SMBv2 response packet that contains (a) an incorrect length value in a NetBIOS header or (b) an additional length field at the end of this response packet, aka "SMB Client Incomplete Response Vulnerability."

Patch / fix

Exploit prediction

34.58% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • g-laurent.blogspot.com http://g-laurent.blogspot.com/2009/11/windows-7-server-2008r2-remote-kernel.html referenced PoC, tagged "exploit" by a source, unverified
  • praetorianprefect.com http://praetorianprefect.com/archives/2009/11/how-to-crash-windows-7-and-server-2008/ referenced PoC, tagged "exploit" by a source, unverified
  • seclists.org http://seclists.org/fulldisclosure/2009/Nov/134 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.1 AV:N/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-399 Resource Management Errors

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.