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Vulnerability record · CVE-2001-1088 · published 5 June 2001

CVE-2001-1088: Microsoft outlook vulnerability

Microsoft · Outlook

Microsoft Outlook 8.5 and earlier, and Outlook Express 5 and earlier, with the "Automatically put people I reply to in my address book" option enabled, do not notify the user when the "Reply-To" address is different than the "From" address, which could allow an untrusted remote attacker to spoof legitimate addresses and intercept email from the client that is intended for another user.

7.5 CVSS 2.0 High EPSS 20% · top 2.7%
7.5CVSS 2.0 base score
20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

Microsoft Outlook 8.5 and earlier, and Outlook Express 5 and earlier, with the "Automatically put people I reply to in my address book" option enabled, do not notify the user when the "Reply-To" address is different than the "From" address, which could allow an untrusted remote attacker to spoof legitimate addresses and intercept email from the client that is intended for another user.

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://support.microsoft.com/default.aspx?scid=kb%3BEN-US%3Bq234241
http://www.securityfocus.com/archive/1/188752 ExploitVendor Advisory
http://www.securityfocus.com/bid/2823 ExploitVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6655
http://support.microsoft.com/default.aspx?scid=kb%3BEN-US%3Bq234241
http://www.securityfocus.com/archive/1/188752 ExploitVendor Advisory
http://www.securityfocus.com/bid/2823 ExploitVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6655

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2001-1088), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.