CVE-2009-1930Windows 2000 Vulnerability
The Telnet service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 allows remote Telnet servers to execute arbitrary code on a client machine by replaying the NTLM credentials of a client user, aka "Telnet…
Published Aug 12, 2009 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2009-1930 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Windows 2000 (Microsoft), Windows 2003 Server (Microsoft), Windows Server 2008 (Microsoft) and 2 more products.
- It is exploited in the wild, listed in Industry KEV feed since May 1, 2010. No public exploit code is known.
- EPSS estimates a 41% 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 listed as exploited in the wild.
Scores
CVSS v2
10.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
41%
Higher than 98.6% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
55/100
Publication score, see How it works
Exploitation Verdict
KEV listed
May 1, 2010
262 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
- advisory36222
- advisoryADV-2009-2237
- patch35993
Description
The Telnet service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 allows remote Telnet servers to execute arbitrary code on a client machine by replaying the NTLM credentials of a client user, aka "Telnet Credential Reflection Vulnerability," a related issue to CVE-2000-0834.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 1, 2010 | n/a | Not reported |
Affected Products
18 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 2000Microsoft | See advisory | n/a |
| Windows 2003 ServerMicrosoft | sp2 | n/a |
| Windows Server 2008Microsoft | See advisory | n/a |
| Windows VistaMicrosoft | See advisory | n/a |
| Windows XpMicrosoft | See advisory | n/a |
Timeline
Publicly disclosed
Aug 12, 2009
Added to Industry KEV feed
May 1, 2010
Last updated
Apr 22, 2026
Weakness Type
- CWE-255
References
- advisory36222
- advisoryADV-2009-2237
- patch35993
- exploitVulnCheck exploitation report
- other56904
FAQ
Common Questions.
The Telnet service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 allows remote Telnet servers to execute arbitrary code on a client machine by replaying the NTLM credentials of a client user, aka "Telnet Credential Reflection Vulnerability," a re…
Affected: Windows 2000 (Microsoft); Windows 2003 Server (Microsoft) versions sp2; Windows Server 2008 (Microsoft), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since May 1, 2010.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2009-1930 On Your Attack Surface?
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