CVE-2001-1088

Exp

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.

Published: 2001-06-05 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2001-1088 is rated High Exploit Risk (84.2/100): CVSS High severity, with high exploitation likelihood (EPSS 47.82%, 98th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +12.24% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2001-1088

EDB-ID Source Kind Published Link
20899 exploit_db edb 2001-06-05 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2001-1088

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-12 35.58% 47.82% +12.24%
2 2026-03-16 35.40% 35.58% +0.18%
3 2025-08-30 — 35.40% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-1088

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2001-1088

Affected software / configurations for CVE-2001-1088

Vendor Product Version Raw CPE
microsoft outlook 97 cpe:2.3:a:microsoft:outlook:97:*:*:*:*:*:*:*
microsoft outlook 98 cpe:2.3:a:microsoft:outlook:98:*:*:*:*:*:*:*
microsoft outlook 2000 cpe:2.3:a:microsoft:outlook:2000:*:*:*:*:*:*:*
microsoft outlook_express 4.0 cpe:2.3:a:microsoft:outlook_express:4.0:*:*:*:*:*:*:*
microsoft outlook_express 4.5 cpe:2.3:a:microsoft:outlook_express:4.5:*:*:*:*:*:*:*
microsoft outlook_express 4.27.3110 cpe:2.3:a:microsoft:outlook_express:4.27.3110:*:*:*:*:*:*:*
microsoft outlook_express 4.72.2106 cpe:2.3:a:microsoft:outlook_express:4.72.2106:*:*:*:*:*:*:*
microsoft outlook_express 4.72.3120.0 cpe:2.3:a:microsoft:outlook_express:4.72.3120.0:*:*:*:*:*:*:*
microsoft outlook_express 4.72.3612 cpe:2.3:a:microsoft:outlook_express:4.72.3612:*:*:*:*:*:*:*
microsoft outlook_express 5.0 cpe:2.3:a:microsoft:outlook_express:5.0:*:*:*:*:*:*:*
microsoft outlook_express 5.5 cpe:2.3:a:microsoft:outlook_express:5.5:*:*:*:*:*:*:*

References for CVE-2001-1088

cvelogic Threat Intelligence