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Fencer Vulns
high 7.1

CVE-2001-0006 json

The Winsock2ProtocolCatalogMutex mutex in Windows NT 4.0 has inappropriate Everyone/Full Control permissions, which allows local users to m…

published 2001-02-12 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-0006

cvss
7.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.0%
EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits
1
Exploit-DB

Summary

The Winsock2ProtocolCatalogMutex mutex in Windows NT 4.0 has inappropriate Everyone/Full Control permissions, which allows local users to modify the permissions to "No Access" and disable Winsock network connectivity to cause a denial of service, aka the "Winsock Mutex" vulnerability.

Patch / fix

Timeline

  1. First public exploit (EDB-20596)
  2. Published

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

3.00% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-20596 Microsoft Windows NT 4.0 - Networking Mutex Denial of Service dos, 2001-01-24

CVSS scores

assigned by version score vector
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.