CVE-2002-0862

mediumpriority · track · 43EPSS 0.158 · 97 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

15.8% (97th) EPSS

CVSS 6.8 · medium

Is it mine?

10 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

The (1) CertGetCertificateChain, (2) CertVerifyCertificateChainPolicy, and (3) WinVerifyTrust APIs within the CryptoAPI for Microsoft products including Microsoft Windows 98 through XP, Office for Mac, Internet Explorer for Mac, and Outlook Express for Mac, do not properly verify the Basic Constraints of intermediate CA-signed X.509 certificates, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack for SSL sessions, as originally reported for Internet Explorer and IIS.

cvss

Technical severity, 0–10. One row per scoring source.

6.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-21692Microsoft Internet Explorer 5/6 / Konqueror 2.2.2/3.0 / Weblogic Server 5/6/7 - Invalid X.509 Certificate Chainfunctional · exploit_db

affected products (10)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft internet explorerall versionsnvdUScpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*
microsoft officeall versionsnvdUScpe:2.3:a:microsoft:office:*:*:*:*:*:*:*:*
microsoft outlook expressall versionsnvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*
microsoft windows 2000all versionsnvdUScpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
microsoft windows 98all versionsnvdUScpe:2.3:o:microsoft:windows_98:*:*:*:*:*:*:*:*
microsoft windows 98seall versionsnvdUScpe:2.3:o:microsoft:windows_98se:*:*:*:*:*:*:*:*
microsoft windows meall versionsnvdUScpe:2.3:o:microsoft:windows_me:*:*:*:*:*:*:*:*
microsoft windows nt= 4.0nvdUScpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*
microsoft windows xpall versionsnvdUScpe:2.3:o:microsoft:windows_xp:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2002-10-04modified 2026-06-16

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+1889 more

references (16)

External citations — patches, advisories, analysis.

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