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Fencer Vulns
critical 10.0

CVE-2009-3103 in the critical feed json

Array index error in the SMBv2 protocol implementation in srv2.sys in Microsoft Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold…

published 2009-09-08 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3086

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
92.3%
EPSS 92.3% chance of exploitation in 30 days, percentile 99.8%
public exploits
9
Metasploit, Exploit-DB

Summary

Array index error in the SMBv2 protocol implementation in srv2.sys in Microsoft Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold and SP2, and Windows 7 RC allows remote attackers to execute arbitrary code or cause a denial of service (system crash) via an & (ampersand) character in a Process ID High header field in a NEGOTIATE PROTOCOL REQUEST packet, which triggers an attempted dereference of an out-of-bounds memory location, aka "SMBv2 Negotiation Vulnerability." NOTE: some of these details are obtained from third party information.

Timeline

  1. First public exploit (Metasploit exploit/windows/smb/ms09_050_smb2_negotiate_func_index)
  2. Published

Exploit prediction

92.35% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/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.