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Vulnerability record · CVE-2000-0621 · published 20 July 2000

CVE-2000-0621: Microsoft outlook vulnerability

Microsoft · Outlook

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.

7.5 CVSS 2.0 High EPSS 22% · top 2.4%
7.5CVSS 2.0 base score
22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.cert.org/advisories/CA-2000-14.html PatchThird Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/1501 PatchVendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-046
https://exchange.xforce.ibmcloud.com/vulnerabilities/5013
http://www.cert.org/advisories/CA-2000-14.html PatchThird Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/1501 PatchVendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-046
https://exchange.xforce.ibmcloud.com/vulnerabilities/5013

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-23397Microsoft Outlook improper input validation privilege escalationCVE-2023-23397 is a critical elevation of privilege flaw in Microsoft Outlook caused by improper input validation and an authentication bypass by cap…KEVEPSS 97%analysed8.8CVE-2023-35311Microsoft Outlook security feature bypass via TOCTOU race conditionCVE-2023-35311 is a security feature bypass in Microsoft Outlook caused by a time-of-check time-of-use (TOCTOU) race condition (CWE-367). It affects …KEVEPSS 16%analysed8.8CVE-2007-0671Microsoft Excel remote code execution via malformed fileCVE-2007-0671 is an unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and possibly other Office products, that allows re…KEVEPSS 43%analysed7.8CVE-2017-11774Microsoft Outlook memory handling flaw allows arbitrary command executionMicrosoft Outlook 2010 SP2, 2013 SP1/RT SP1 and 2016 mishandle objects in memory, letting an attacker bypass Outlook security features and execute ar…KEVEPSS 60%analysed7.8CVE-2015-1641Microsoft Office Word RTF out-of-bounds write memory corruptionMicrosoft Word and related Office components (Word 2007/2010/2013, Word for Mac 2011, Office Compatibility Pack, Word Automation Services, Office Web…KEVEPSS 97%analysed10.0CVE-2004-0380Outlook Express MHTML handler domain bypass leads to code executionThe MHTML protocol handler in Microsoft Outlook Express 5.5 SP2 through 6 SP1 fails to enforce domain restrictions, letting remote attackers bypass s…EPSS 63%analysed10.0CVE-2001-0538Microsoft Outlook View ActiveX Control allows remote command executionThe Outlook View ActiveX Control in Microsoft Outlook 2002 and earlier fails to properly restrict how it is invoked, so a malicious HTML e-mail or we…EPSS 53%analysed10.0CVE-1999-0967Microsoft internet explorer vulnerabilityBuffer overflow in the HTML library used by Internet Explorer, Outlook Express, and Windows Explorer via the res: local resource protocol.EPSS 6.9%

Source: NIST National Vulnerability Database (record CVE-2000-0621), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.