CVE record · CVE-2026-26133

M365 Copilot Information Disclosure Vulnerability

CVSS 7.1 HighEPSS 0.0045 · 39th percentile

Published by the CVE Program (CNA: microsoft) at 13 Mar 2026, 21:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Microsoft 365 Copilot for Android	affected 1.0 to before 16.0.19815.10000 custom
Microsoft	Microsoft 365 Copilot for iOS	affected 1.0 to before 2.107.2 custom
Microsoft	Microsoft Edge for Android	affected 1.0.0 to before 145.3800.99 custom
Microsoft	Microsoft Edge for iOS	affected 1.0.0.0 to before 145.3800.99 custom
Microsoft	Microsoft Excel for Android	affected 16.0.0.0 to before 16.0.19822.20038 custom
Microsoft	Microsoft Excel for iOS	affected 1.0 to before 2.106.26020617 custom
Microsoft	Microsoft Loop for iOS	affected 2.0.0 to before 2.106.26020617 custom
Microsoft	Microsoft OneNote	affected 1.0.0 to before 2.106.26020617 custom
Microsoft	Microsoft OneNote for Android	affected 16.0.1 to before 16.0.19725.20142 custom
Microsoft	Microsoft Outlook for Android	affected 1.0 to before 5.2605 custom
Microsoft	Microsoft Outlook for iOS	affected 1.0.0 to before 5.2605 custom
Microsoft	Microsoft Outlook for Mac	affected 1.0.0 to before 5.2605 custom
Microsoft	Microsoft PowerBI for Android	affected 2.0.0 to before 2.2.260210.21290750 custom
Microsoft	Microsoft PowerBI for iOS	affected 1.0.0 to before 1.2.260302.2193910 custom
Microsoft	Microsoft PowerPoint for Android	affected 16.0.0.0 to before 16.0.19822.20038 custom
Microsoft	Microsoft PowerPoint for iOS	affected 1.0 to before 2.106.26020617 custom
Microsoft	Microsoft Teams for Android	affected 1.0.0 to before 1.0.0.2026043102 custom
Microsoft	Microsoft Teams for iOS	affected 2.0.0 to before 8.3.1 custom
Microsoft	Microsoft Word for Android	affected 16.0.0.0 to before 16.0.19822.20038 custom
Microsoft	Microsoft Word for iOS	affected 2.0.0 to before 2.106.26020617 custom

Identifiers: CVE-2026-26133
CNA: microsoft
Weakness (CWE): CWE-77
Tags: Microsoft 365 Copilot for Android
Microsoft 365 Copilot for iOS
Microsoft Edge for Android
Microsoft Edge for iOS
Microsoft Excel for Android
Microsoft Excel for iOS
Microsoft Loop for iOS
Microsoft OneNote
Command injection
Published: 13 Mar 2026
Updated: 19 Jun 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.1	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.0045, the 39th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 Mar 2026. New records show when each source confirmed them.

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26133 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.