Windows NT 4.0 does not properly shut down invalid named pipe RPC connections, which allows remote attackers to cause a denial of service (r
Windows NT 4.0 does not properly shut down invalid named pipe RPC connections, which allows remote attackers to cause a denial of service (resource exhaustion) via a series of connections containing malformed data, aka the "Named Pipes Over RPC" vulnerability.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Dec 31, 1999
- Updated
- Jun 16, 2026
- EPSS
- 17.7% · 97th percentile
- CWE
- CWE-772
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Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 5 / 30 · 17.7%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | windows nt | cpe:2.3:o:microsoft:windows_nt |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft windows nt4.0
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2004-0900The DHCP Server service for Microsoft Windows NT 4.0 Server and Terminal Server Edition does not properly validate the length of certain mes48Plan
- CVE-2008-3018Microsoft Office 2000 SP3, XP SP3, and 2003 SP2; Office Converter Pack; and Works 8 do not properly parse the length of a PICT file, which a46Plan
- CVE-1999-0489MSHTML.DLL in Internet Explorer 5.0 allows a remote attacker to paste a file name into the file upload intrinsic control, a variant of "untr44Plan
- CVE-2001-0045The default permissions for the RAS Administration key in Windows NT 4.0 allows local users to execute arbitrary commands by changing the va43Plan
- CVE-2004-0899The DHCP Server service for Microsoft Windows NT 4.0 Server and Terminal Server Edition, with DHCP logging enabled, does not properly valida42Plan
- CVE-1999-0886The security descriptor for RASMAN allows users to point to an alternate location via the Windows NT Service Control Manager.42Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-772 · Missing Release of Resource after Effective LifetimeCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- support.microsoft.com/support/kb/articles/Q195/7/33.asp
- www.iss.net/security_center/static/523.php
- docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-017
Vendor advisories and official records. Exploit/PoC links are deliberately left out.