Actively exploited in the wild. This CVE is on the CISA Known Exploited Vulnerabilities list — treat remediation as urgent. Federal remediation due by 24 Mar 2022.
Windows 2000Operating system · Microsoft

CVE-2002-0367

HIGH · 7.8 CVSS v3.1 Published 2002-06-25
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
96/100
Remediation priority · Urgent
In the wild Public exploit Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
smss.exe debugging subsystem in Windows NT and Windows 2000 does not properly authenticate programs that connect to other programs, which allows local users to gain administrator or SYSTEM privileges by duplicating a handle to a privileged process, as demonstrated by DebPloit.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The smss.exe debugging subsystem in Windows NT and Windows 2000 lacks proper authentication for programs connecting to other programs, enabling local users to escalate privileges by duplicating handles to privileged processes. This vulnerability can lead to unauthorized access to administrator or SYSTEM privileges.

MitigationTo remediate this vulnerability, ensure that proper authentication mechanisms are in place for program connections and consider upgrading to a more secure version of the operating system. Regularly review and restrict access to privileged processes.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Windows 2000Operating system
Affected:all versions
Windows NtOperating system
Affected:= 4.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check installed Windows version
    Open the command prompt and run 'ver' or 'systeminfo'.
    Affected if The output shows 'Microsoft Windows 2000' or 'Microsoft Windows NT 4.0'.
  2. Verify if debugging subsystem is enabled
    Check system settings or group policies related to debugging features.
    Affected if The debugging subsystem is enabled on the affected Windows version.

You are affected if you are running Windows 2000 or Windows NT 4.0 with the debugging subsystem enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch www.iss.net →
Interim mitigation

To remediate this vulnerability, ensure that proper authentication mechanisms are in place for program connections and consider upgrading to a more secure version of the operating system. Regularly review and restrict access to privileged processes.

Recommended fix High confidence
  1. This vulnerability affects Windows NT 4.0 and Windows 2000, which are both end-of-life operating systems no longer supported by Microsoft.
  2. There is no vendor-provided patch available for these legacy systems.
  3. The only remediation is to migrate to a supported Windows operating system version.
  4. If migration is not possible immediately, minimize the attack surface by restricting physical access and limiting local user permissions.
Caveat Windows NT 4.0 and Windows 2000 are end-of-life; no security updates are available; complete system migration required

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Windows 2000 Exploited in the wild — priority engagement
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing3.0 h
  • Review / QA2.0 h
15.0 hours of engineering $2,690
Get it fixed fast

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,304.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2002-0367 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2002-0367 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data