CVE-2006-2374

Status: ModifiedMedium (5.5)—💥 Exploit

The Server Message Block (SMB) driver (MRXSMB.SYS) in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 and earlier allows local users to cause a denial of service (hang) by calling the MrxSmbCscIoctlCloseForCopyChunk with the file handle of the shadow device, which results in a deadlock, aka the "SMB Invalid Handle Vulnerability."

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base score: 5.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 1.75%
Percentile among all scored CVEs: 77
Score date: 10/7/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · Microsoft Windows XP/2000 - 'Mrxsmb.sys' Local Privilege Escalation (MS06-030) (6/14/2006)
Published on Exploit-DB · Microsoft SMB Driver - Local Denial of Service (6/13/2006)

Affected technologies (3)

Microsoft — Windows 2000 Microsoft — Windows 2003 Server Microsoft — Windows XP

CWEs

CWE-667

References

Raw JSON (NVD)

Show

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  "lastModified": "2026-06-16T22:24:52.980",
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