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CVE-2009-3103

HIGH · CVSS 10.0EPSS 92.3%EU EUVD

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.

Key facts

CVSS score
10.0 (v2.0)
Severity
HIGH
CVSS vector
AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness (CWE)
CWE-399
EPSS score
92.3% (100th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2009-3086)
Published
September 8, 2009
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-3086 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows server 2008
  • microsoft / windows vista
  • microsoft / windows vista
  • microsoft / windows vista

Certified products that may be affected

17 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

See all 17 in the Security Certifications Explorer.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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CVE-2009-3103: HIGH severity (CVSS 10.0)