CVE-2024-20670

highpriority · track · 1EPSS 0.023 · 83 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.31% (83rd) EPSS

CVSS 8.1 · high

Is it mine?

10 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Outlook for Windows Spoofing Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedOutlook for Windowsmsrc_csaf
1.2023.0322.0100:Security Update:https://apps.microsoft.com/detail/9nrx63209r7b?cid=cmmdoli6tgo&hl=en-us&gl=US
https://apps.microsoft.com/detail/9nrx63209r7b?cid=cmmdoli6tgo&hl=en-us&gl=US

cvss

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

8.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.1highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:Csecondary · ENISA EU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Nsecondary · secure@microsoft.com USexploitability 2.8 · impact 5.2

v3.17.4highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-20USCWE-20US

affected products (10)

Products and version ranges known to be affected.

Microsoft 365 Appsall versionscert_bundDEcpe:/a:microsoft:365_apps:word
Microsoft Office LTSC for Mac 2021all versionscert_bundDEcpe:/a:microsoft:office:ltsc_for_mac_2021
Microsoft SharePoint Server 2016all versionscert_bundDEcpe:/a:microsoft:sharepoint_server_2016:-
Microsoft SharePoint Server 2019all versionscert_bundDEcpe:/a:microsoft:sharepoint_server_2019:-
Microsoft SharePoint Server Subscription Editionall versionscert_bundDEcpe:/a:microsoft:sharepoint:server_subscription_edition
Microsoft Outlook for Windows1.0.0 → 1.2023.0322.0100enisa_euvdEU
Microsoft Corp Microsoft Outlook≤ 1.2023.0322.0100fstec_bduRU
Outlook for Windowsall versionsfixedmsrc_csafUS
Outlook for Windows< 1.2023.0322.0100msrc_csafUS
microsoft outlook< 1.2023.0322.0100nvdUScpe:2.3:a:microsoft:outlook:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-0843Microsoft Office: Mehrere SchwachstellenDeutsch2024-04-09csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Microsoft 365 Apps, Microsoft Office, Microsoft SharePoint, Microsoft SharePoint Server 2016 und Microsoft SharePoint Server 2019 ausnutzen, um beliebigen Programmcode auszuführen oder Cross-Site Scripting (XSS)-Angriffe durchzuführen.
msrc_CVE-2024-20670Outlook for Windows Spoofing Vulnerability2024-04-09csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf nvd NVD CVE.org MITRE

published 2024-04-09modified 2026-06-17

references (4)

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.

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