CVE-2026-88203

mediumpriority · track · 26EPSS 0.008 · 57 %ileDEFRNLUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.83% (57th) EPSS

CVSS 6.5 · medium

Is it mine?

37 products

Check your exposure

Who says so?

3 sources

cert_bund · ncsc_nl · certfr

EPSS · scored 2026-10-21

Untrusted pointer dereference in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.

cvss

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

6.5

010

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

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:Nprimary · secure@microsoft.com USexploitability 2.8 · impact 3.6

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

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-822US

affected products (37)

Products and version ranges known to be affected.

Microsoft 365 Appsall versionscert_bundDEcpe:/a:microsoft:365_apps:-
Microsoft Excelall versionscert_bundDEcpe:/a:microsoft:excel:-
Microsoft Microsoft Office LTSC 2021all versionscert_bundDEcpe:/a:microsoft:microsoft_office_ltsc_2021:-
Microsoft Microsoft Office LTSC 2024all versionscert_bundDEcpe:/a:microsoft:microsoft_office_ltsc_2024:-
Microsoft Office 365 for Macall versionscert_bundDEcpe:/a:microsoft:office_365:for_mac
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 PowerPointall versionscert_bundDEcpe:/a:microsoft:powerpoint:-
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 Skype for Business Server 2015 CU13all versionscert_bundDEcpe:/a:microsoft:skype:for_business_server_2015_cu13
Microsoft Skype for Business Server 2019 CU8all versionscert_bundDEcpe:/a:microsoft:skype:for_business_server_2019_cu8
Microsoft Skype for Business Server Subscription Edition CU1all versionscert_bundDEcpe:/a:microsoft:skype:for_business_server_subscription_edition_cu1
Microsoft Wordall versionscert_bundDEcpe:/a:microsoft:word:-
Microsoft Microsoft 365 Apps for Enterprise for 32-bit Systems≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft 365 Apps for Enterprise for 64-bit Systems≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office 365 for Mac≤ vers:unknown/*ncsc_nlNL

showing 20 of 37

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0422Kwetsbaarheden verholpen in Microsoft OfficeNL2026-10-13csaf · ncsc_nlNL
Microsoft heeft xxx kwetsbaarheden verholpen in diverse Office producten, zoals Word, Excel, Access, Outlook, Visio, Sharepoint en PowerPoint, maar ook subcomponenten als Shell, Azure Key Vault en Click-to-Run.
WID-SEC-W-2026-3916Microsoft Office Produkte: Mehrere Schwachstellen ermöglichen PrivilegieneskalationDeutsch2026-10-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Microsoft Office Produkten ausnutzen, um seine Privilegien zu erhöhen, um Code auszuführen, um Informationen offenzulegen oder zu manipulieren und um Sicherheitsmechanismen zu umgehen.
CERTFR-2026-AVI-1312Multiples vulnérabilités dans Microsoft OfficeFrançais2026-10-14vendor · certfrFR

sources

Which sources assert this record, and when.

cert_bund ncsc_nl certfr NVD CVE.org MITRE

published 2026-10-13modified 2026-10-15

references (1) nvd

External citations — patches, advisories, analysis.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88203Vendor Advisory

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