CVE-2002-1183

Microsoft Windows 98 and Windows NT 4.0 do not properly verify the Basic Constraints of digital...

7.5 HighPublic exploit

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).

Exploit likelihood

19.3%Down 15.7 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2002-1183
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated: 2026-11-02

CVE List No score

Record: CVE-2002-1183
Updated: 2026-11-02

EUVDEUVD-2002-1167 No score

Record: EUVD-2002-1167
Updated: 2026-11-03

GitHub AdvisoriesGHSA-c4v9-9c8q-335m No score

Microsoft Windows 98 and Windows NT 4.0 do not properly verify the Basic Constraints of digital...

Record: GHSA-c4v9-9c8q-335m
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Microsoft Internet Explorer 5/6 / Konqueror 2.2.2/3.0 / Weblogic Server 5/6/7 - Invalid X.509 Certificate Chain	2002-08-06

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2002-1183 is a high vulnerability (CVSS 7.5) in Microsoft Windows 98, published December 11, 2002. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 19.3%, the 97th percentile. No source names a fixed version.