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Vulnerability record · CVE-2002-1256 · published 23 December 2002

CVE-2002-1256: Microsoft windows 2000 vulnerability

Microsoft · Windows 2000

The SMB signing capability in the Server Message Block (SMB) protocol in Microsoft Windows 2000 and Windows XP allows attackers to disable the digital signing settings in an SMB session to force the data to be sent unsigned, then inject data into the session without detection, e.g. by modifying group policy information sent from a domain controller.

5.0 CVSS 2.0 Medium EPSS 5.4% · top 7.6%
5.0CVSS 2.0 base score
5.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

The SMB signing capability in the Server Message Block (SMB) protocol in Microsoft Windows 2000 and Windows XP allows attackers to disable the digital signing settings in an SMB session to force the data to be sent unsigned, then inject data into the session without detection, e.g. by modifying group policy information sent from a domain controller.

AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/6367
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-070
https://exchange.xforce.ibmcloud.com/vulnerabilities/10843
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A277
http://www.securityfocus.com/bid/6367
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-070
https://exchange.xforce.ibmcloud.com/vulnerabilities/10843
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A277

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2002-1256), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.