How severe is CVE-2006-2374?

CVE-2006-2374 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2006-2374 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-2374?

CVE-2006-2374 primarily affects Microsoft Windows 2000. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-2374?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-2374 published?

CVE-2006-2374 was published on 2006-06-13 and last updated on 2026-06-16.

CVE-2006-2374

CVE-2006-2374 is a medium-severity vulnerability in Microsoft Windows 2000 with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-667.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-667
Affected product: Microsoft Windows 2000
Published: 2006-06-13
Last modified: 2026-06-16

Description

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."

Frequently asked questions

What is CVE-2006-2374?: 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."
How severe is CVE-2006-2374?: CVE-2006-2374 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2006-2374 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-2374?: CVE-2006-2374 primarily affects Microsoft Windows 2000. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-2374?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-2374 published?: CVE-2006-2374 was published on 2006-06-13 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:o:microsoft:windows_2000:-:sp4:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:-:*:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_2003_server:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_2003_server:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2003_server:-:sp1:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_xp:-:*:*:*:professional:*:x64:*
cpe:2.3:o:microsoft:windows_xp:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:*:*:*:*

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