Description
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.
Exploits (1)
exploitdb
WORKING POC
VERIFIED
by Arne Vidstrom · cdoswindows
https://www.exploit-db.com/exploits/20596
Scores
CVSS v3
7.1
EPSS
0.0013
EPSS Percentile
31.8%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-732
Status
published
Products (1)
microsoft/windows_nt
4.0
Published
Feb 12, 2001
Tracked Since
Feb 18, 2026