CVE-2000-0621: n/a vulnerability

CVE-2000-0621: Microsoft Outlook 98 and 2000, and Outlook Express 4.0x and 5.0x, allow remote attackers to read files on t...

Microsoft Outlook 98 and 2000, and Outlook Express 4.0x and 5.0x, allow remote attackers to read files on the client's system via a malformed HTML message that stores files outside of the cache, aka the "Cache Bypass" vulnerability.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 05:21 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old email-client vulnerability where a malformed HTML email could let a remote attacker read files from a user’s computer. The cited sources identify Microsoft Outlook 98/2000 and Outlook Express 4.0x/5.0x. Business risk is mainly for environments retaining legacy desktop email clients. Exposure is unlikely in modern managed environments but plausible where legacy Windows email clients remain in labs, archives, OT, or unmanaged endpoints. Treat as a legacy-risk verification item, not a broad emergency. Escalate if affected clients are found on systems handling sensitive files or business email. Mitigation focus: Inventory endpoints for Outlook 98/2000 and Outlook Express 4.0x/5.0x.; Review and apply Microsoft MS00-046 guidance where affected clients exist.; Retire or isolate legacy clients that cannot be remediated..

Prepared: Jul 12, 2026, 00:24 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: Oct 13, 2000, 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
outlook-cache-bypass(5013)CVE reference · vdb-entry, x_refsource_XF
MS00-046CVE reference · vendor-advisory, x_refsource_MS

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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