CVE-2001-0338: n/a vulnerability

CVE-2001-0338: Internet Explorer 5.5 and earlier does not properly validate digital certificates when Certificate Revocati...

Internet Explorer 5.5 and earlier does not properly validate digital certificates when Certificate Revocation List (CRL) checking is enabled, which could allow remote attackers to spoof trusted web sites, aka the "Server certificate validation vulnerability."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 04:14 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2001-0338 is an old Internet Explorer certificate-validation flaw. In Internet Explorer 5.5 and earlier, certificate revocation checking could fail to prevent a malicious site from appearing trusted. Business risk is mainly for environments still using legacy IE for internal or industrial workflows. Exposure is most likely in legacy Windows environments, old kiosk systems, lab networks, or business applications that still require Internet Explorer 5.5 or earlier. Treat as a legacy exposure issue. It is not flagged as actively exploited in the provided sources, but any remaining affected browser use creates avoidable trust and credential risk. Mitigation focus: Identify any systems using Internet Explorer 5.5 or earlier.; Review Microsoft MS01-027 for vendor guidance and updates.; Remove dependency on unsupported legacy browsers where possible..

Prepared: Jul 1, 2026, 09:01 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 18, 2001, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
MS01-027CVE reference · vendor-advisory, x_refsource_MS
ie-crl-certificate-spoofing(6555)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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