CVE-2001-1088

highpriority · attend · 47EPSS 0.197 · 97 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

19.7% (97th) EPSS

CVSS 7.5 · high

Is it mine?

12 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.5

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.06.8mediumAV:N/AC:L/Au:N/C:P/I:P/A:P/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284USLLM-inferredCWE-352USLLM-inferred

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-20899Microsoft Outlook 97/98/2000/4/5 - Address Book Spoofingfunctional · exploit_db

affected products (12)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft outlook= 2000nvdUScpe:2.3:a:microsoft:outlook:*:*:*:*:*:*:*:*
microsoft outlook= 97nvdUScpe:2.3:a:microsoft:outlook:*:*:*:*:*:*:*:*
microsoft outlook= 98nvdUScpe:2.3:a:microsoft:outlook:*:*:*:*:*:*:*:*
microsoft outlook express= 4.0nvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*
microsoft outlook express= 4.27.3110nvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*
microsoft outlook express= 4.5nvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*
microsoft outlook express= 4.72.2106nvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*
microsoft outlook express= 4.72.3120.0nvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*
microsoft outlook express= 4.72.3612nvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*
microsoft outlook express= 5.0nvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*
microsoft outlook express= 5.5nvdUScpe:2.3:a:microsoft:outlook_express:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2001-06-05modified 2026-06-16

references (8)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan