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Fencer Vulns
high 7.5

CVE-2002-1183 in the critical feed json

Microsoft Windows 98 and Windows NT 4.0 do not properly verify the Basic Constraints of digital certificates, allowing remote attackers to…

published 2002-12-11 23 y ago modified 2026-06-16 4 mo ago also EUVD-2002-1167

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
19.3%
EPSS 19.3% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

Summary

Microsoft Windows 98 and Windows NT 4.0 do not properly verify the Basic Constraints of digital certificates, allowing remote attackers to execute code, aka "New Variant of Certificate Validation Flaw Could Enable Identity Spoofing" (CAN-2002-0862).

Patch / fix

Timeline

  1. First public exploit (EDB-21692)
  2. Published

Exploit prediction

19.34% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-21692 Microsoft Internet Explorer 5/6 / Konqueror 2.2.2/3.0 / Weblogic Server 5/6/7 - Invalid X.509 Certificate Chain remote, 2002-08-06
  • securityfocus.com http://www.securityfocus.com/bid/5410 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

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.