Is CVE-2009-3103 actively exploited?

CVE-2009-3103 has no public evidence of in-the-wild exploitation as of 2026-04-23.

What is the CVSS score for CVE-2009-3103?

CVE-2009-3103 has a CVSS score of 10 (UNKNOWN severity). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

How do I patch CVE-2009-3103?

Patch guidance is available from microsoft security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2009-3103.

CVE-2009-3103 - remediation guidance & executive summary

Q: Which products are affected by CVE-2009-3103?

10 products: microsoft windows server 2008, microsoft windows server 2008, microsoft windows server 2008, microsoft windows server 2008, microsoft windows server 2008, and 5 more.

Description

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.

CVSS Metrics

Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector: network
Access Cmplx: low
Auth: none
Confidentiality: complete
Integrity: complete
Availability: complete
Weaknesses: CWE-399

Metadata

Primary Vendor: MICROSOFT
Published: 9/8/2009
Last Modified: 4/23/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : windows_server_2008microsoft : windows_server_2008microsoft : windows_server_2008microsoft : windows_server_2008microsoft : windows_server_2008microsoft : windows_server_2008microsoft : windows_server_2008microsoft : windows_vistamicrosoft : windows_vistamicrosoft : windows_vista

Remediation Guidance

Executive Summary

View on NIST NVD