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CWE-287

4,461 CVEs • Abstraction: Class • Likelihood of Exploit: High

Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

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CVEs (4,461)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Microsoft
1Windows Nt
Apr 16, 2026
Feb 8, 1999
N/A· v4
N/A· v3
7.5 HIGH· v2
In some cases, Service Pack 4 for Windows NT 4.0 can allow access to network shares using a blank password, through a problem with a null NT hash value.