Windows 2000 vulnerabilitiesAnd the versions its exploited flaws hit.
Windows 2000 is made by Microsoft. We track 635 published vulnerabilities listed under that exact name, across 6 versions. 8 of them are on the list of flaws known to be exploited, the newest added on 20 May 2026. Microsoft lists newer releases under their own names, such as Windows 2000 Terminal Services, so check those pages too.
The most recent Windows 2000 flaw added to the known-exploited list is CVE-2010-0806, on 20 May 2026. We keep watching the known-exploited list.
Is Windows 2000 listed under other names? Yes.
Microsoft also lists Windows 2000 under more specific names, such as Windows 2000 Terminal Services and Windows 2000 Advanced Server. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.
Which versions of Windows 2000 do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
- CVE-2009-1537Exploited list, 20 May 2026
Microsoft DirectX NULL Byte Overwrite Vulnerability
all versions
7 more exploited flaws name Windows 2000 without a version of its own, for example as the system other affected software runs on. They are in the list below.
Which Windows 2000 vulnerabilities are being exploited?
8 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 8.8Microsoft Internet Explorer Use-After-Free Vulnerability
Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code via vectors involving access to an invalid pointer after the deletion of an object.
- 9.8Microsoft Windows Buffer Overflow Vulnerability
Microsoft Windows contains a buffer overflow vulnerability in the Windows Server Service that allows remote attackers to execute arbitrary code via a crafted RPC request that triggers an overflow during path...
- 8.8Microsoft DirectX NULL Byte Overwrite Vulnerability
Microsoft DirectX contains a NULL byte overwrite vulnerability in the QuickTime Movie Parser Filter in quartz.dll in DirectShow which could allow remote attackers to execute arbitrary code via a crafted QuickTime...
- 8.8Microsoft Internet Explorer Use-After-Free Vulnerability
Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code by accessing a pointer associated with a deleted object.
- 7.8Microsoft Windows Privilege Escalation Vulnerability
smss.exe debugging subsystem in Microsoft Windows does not properly authenticate programs that connect to other programs, which allows local users to gain administrator or SYSTEM privileges.
- 7.8Microsoft Windows Privilege Escalation Vulnerability
A privilege elevation vulnerability exists in the POSIX subsystem.
- 7.8Microsoft Windows Kernel Exception Handler Vulnerability
The kernel in Microsoft Windows, when access to 16-bit applications is enabled on a 32-bit x86 platform, does not properly validate certain BIOS calls, which allows local users to gain privileges.
- 7.8Microsoft Windows Improper Input Validation Vulnerability
The kernel in Microsoft Windows does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application.
Which Windows 2000 flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 98%CVE-2003-0352High
Buffer overflow in a certain DCOM interface for RPC in Microsoft Windows NT 4.0, 2000, XP, and Server 2003 allows remote attackers to execute arbitrary code via a malformed message, as exploited by the...
- 98%CVE-2009-1122High
The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000 SP4 does not properly decode URLs, which allows remote attackers to bypass authentication, and possibly read or create files,...
- 93%CVE-2005-1983Critical
Stack-based buffer overflow in the Plug and Play (PnP) service for Microsoft Windows 2000 and Windows XP Service Pack 1 allows remote attackers to execute arbitrary code via a crafted packet, and local users to gain...
- 91%CVE-2009-3023Critical
Buffer overflow in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 6.0 allows remote authenticated users to execute arbitrary code via a crafted NLST (NAME LIST) command that uses...
- 86%CVE-2001-0241Critical
Buffer overflow in Internet Printing ISAPI extension in Windows 2000 allows remote attackers to gain root privileges via a long print request that is passed to the extension through IIS 5.0.
- 86%CVE-2003-0109High
Buffer overflow in ntdll.dll on Microsoft Windows NT 4.0, Windows NT 4.0 Terminal Server Edition, Windows 2000, and Windows XP allows remote attackers to execute arbitrary code, as demonstrated via a WebDAV request...
Running Windows 2000? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
Microsoft Internet Explorer contains an use-after-free vulnerability that could allow remote attackers to execute arbitrary code via vectors involving access to an invalid pointer after the deletion of an object. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
- Matched to
- Windows 2000 on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 635 published vulnerabilities listed under the name Windows 2000, across 6 versions. The most recent Windows 2000 flaw added to the known-exploited list is CVE-2010-0806, on 20 May 2026.
8 are on the list of flaws known to be exploited. The most recently added are CVE-2010-0806, CVE-2008-4250 and CVE-2009-1537.
Microsoft also lists Windows 2000 under more specific names, such as Windows 2000 Terminal Services and Windows 2000 Advanced Server. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.
Each flaw names its own versions, usually as ranges. The newest, CVE-2009-1537, affects all versions. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Windows 2000. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.