CVE-2026-33823

mediumpriority · track · 26EPSS 0.007 · 54 %ileDEEUNLRUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.72% (54th) EPSS

CVSS 6.5 · medium

Is it mine?

49 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network.

cvss

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

9.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6–9.6

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.19.6criticalAV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:Csecondary · ENISA EU

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Nsecondary · secure@microsoft.com USexploitability 3.1 · impact 5.8

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Nsecondary · NCSC-NL NL

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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-285USCWE-285USCWE-285US

affected products (49)

Products and version ranges known to be affected.

Microsoft 365 Appsall versionscert_bundDEcpe:/a:microsoft:365_apps:-
Microsoft Excel 2016all versionscert_bundDEcpe:/a:microsoft:excel:2016
Microsoft Excel for Androidall versionscert_bundDEcpe:/a:microsoft:excel:webapp:2010:sp2
Microsoft Office 2016all versionscert_bundDEcpe:/a:microsoft:office:2016
Microsoft Office 2019all versionscert_bundDEcpe:/a:microsoft:office:2019
Microsoft Office LTSC 2021all versionscert_bundDEcpe:/a:microsoft:office:ltsc_2021
Microsoft Office LTSC 2024all versionscert_bundDEcpe:/a:microsoft:office:ltsc_2024
Microsoft Office LTSC for Mac 2021all versionscert_bundDEcpe:/a:microsoft:office:ltsc_for_mac_2021
Microsoft Office LTSC for Mac 2024all versionscert_bundDEcpe:/a:microsoft:office:ltsc_for_mac_2024
Microsoft Office Online Serverall versionscert_bundDEcpe:/a:microsoft:office_online_server:-
Microsoft Office for Androidall versionscert_bundDEcpe:/a:microsoft:office:for_android
Microsoft Outlook for iOSall versionscert_bundDEcpe:/a:microsoft:outlook:for_ios
Microsoft PowerPoint for Androidall versionscert_bundDEcpe:/a:microsoft:powerpoint:for_android
Microsoft SharePoint Enterprise Server 2016all versionscert_bundDEcpe:/a:microsoft:sharepoint:enterprise_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 Teamsall versionscert_bundDEcpe:/a:microsoft:teams:-
Microsoft Teams for Androidall versionscert_bundDEcpe:/a:microsoft:teams:for_android
Microsoft Word 2016all versionscert_bundDEcpe:/a:microsoft:word:2016
Microsoft Microsoft Teamsall versionsenisa_euvdEU

showing 20 of 49

advisories (4)

Vendor and ecosystem advisories describing this.

NCSC-2026-0144Kwetsbaarheden verholpen in Microsoft OfficeNL2026-05-12csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in diverse Office producten.
WID-SEC-W-2026-1413Microsoft Teams: Schwachstelle ermöglicht Offenlegung von InformationenDeutsch2026-05-07csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Microsoft Teams ausnutzen, um Informationen offenzulegen.
WID-SEC-W-2026-1490Microsoft Office: Mehrere SchwachstellenDeutsch2026-05-12csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Excel, Microsoft Word, Microsoft Office, Microsoft Office Online Server, Microsoft SharePoint, Microsoft SharePoint Server 2019, Microsoft Outlook, Microsoft Teams, Microsoft 365 Apps und Microsoft PowerPoint ausnutzen, um erweiterte Berechtigungen – einschließlich Administratorrechte – zu erlangen, beliebigen Code im Kontext des Dienstes auszuführen, Spoofing-Angriffe durchzuführen, Daten zu manipulieren und vertrauliche Informationen offenzulegen.
msrc_CVE-2026-33823Microsoft Team Events Portal Information Disclosure Vulnerability2026-05-07csaf · 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 ncsc_nl msrc_csaf NVD CVE.org MITRE

published 2026-05-07modified 2026-10-26

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.

Free scan