CVE-2008-4037
CriticalPublic exploitMicrosoft Windows 2000 Gold through SP4, XP Gold through SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008 allows remote SMB servers to execute arbitrary code on a client machine by replaying the NTLM credentials of a client user, as demonstrated by backrush, aka…
Published Nov 12, 2008 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2008-4037 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Windows 2000 (Microsoft), Windows (Microsoft), Windows Server 2008 (Microsoft) and 1 more product.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 59% 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 it is very likely to be exploited soon.
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
59%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2008-4037 brief as a PDF
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Description
Microsoft Windows 2000 Gold through SP4, XP Gold through SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008 allows remote SMB servers to execute arbitrary code on a client machine by replaying the NTLM credentials of a client user, as demonstrated by backrush, aka "SMB Credential Reflection Vulnerability." NOTE: some reliable sources report that this vulnerability exists because of an insufficient fix for CVE-2000-0834.
Affected Products
17 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 2000Microsoft | See advisory | n/a |
| WindowsMicrosoft | server_2003-sp1, server_2003-sp2, server_2003-unknown, xp-sp2, xp-sp3, xp-unknown | n/a |
| Windows Server 2008Microsoft | See advisory | n/a |
| Windows VistaMicrosoft | See advisory | n/a |
Timeline
Publicly disclosed
Nov 12, 2008
Last updated
Apr 22, 2026
Weakness Type
- CWE-287 Improper Authentication
References
- advisory32633
- advisoryADV-2008-3110
- patch7385
- exploitMSF smb_relay.rb
- exploitExploitDB-16360
FAQ
Common Questions.
Microsoft Windows 2000 Gold through SP4, XP Gold through SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008 allows remote SMB servers to execute arbitrary code on a client machine by replaying the NTLM credentials of a client user, as demonstrated by backrush, aka "SMB Credential Reflection Vulnerabilit…
Affected: Windows 2000 (Microsoft); Windows (Microsoft) versions server_2003-sp1, server_2003-sp2, server_2003-unknown, xp-sp2, xp-sp3, xp-unknown; Windows Server 2008 (Microsoft), among others. 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 it is very likely to be exploited soon.
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