CVE-2006-2373Windows 2000 Vulnerability
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 execute arbitrary code by calling the MrxSmbCscIoctlOpenForCopyChunk function with the METHOD_NEITHER method flag and an…
Published Jun 13, 2006 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2006-2373 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Windows 2000 (Microsoft), Windows Server 2003 (Microsoft), Windows Xp (Microsoft).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 29% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
10.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
29%
Higher than 98.1% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
48/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
2
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisory20635
- advisory1016288
- advisorywin-smb-privilege-escalation(26828)
- advisoryoval:org.mitre.oval:def:1137
- advisoryoval:org.mitre.oval:def:1730
- advisoryoval:org.mitre.oval:def:1792
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 execute arbitrary code by calling the MrxSmbCscIoctlOpenForCopyChunk function with the METHOD_NEITHER method flag and an arbitrary address, possibly for kernel memory, aka the "SMB Driver Elevation of Privilege Vulnerability."
Affected Products
7 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 2000Microsoft | See advisory | n/a |
| Windows Server 2003Microsoft | See advisory | n/a |
| Windows XpMicrosoft | See advisory | n/a |
Timeline
Publicly disclosed
Jun 13, 2006
Last updated
Apr 15, 2026
Weakness Type
- CWE-264
References
- advisory20635
- advisory1016288
- advisorywin-smb-privilege-escalation(26828)
- advisoryoval:org.mitre.oval:def:1137
- advisoryoval:org.mitre.oval:def:1730
FAQ
Common Questions.
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 execute arbitrary code by calling the MrxSmbCscIoctlOpenForCopyChunk function with the METHOD_NEITHER method flag and an arbitrary address, possibly for kernel memory,…
Affected: Windows 2000 (Microsoft); Windows Server 2003 (Microsoft); Windows Xp (Microsoft). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2006-2373 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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