M365 Copilot Information Disclosure Vulnerability
Summary
| CVE | CVE-2026-26133 |
|---|---|
| State | PUBLISHED |
| Assigner | microsoft |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-03-16 14:18:26 UTC |
| Updated | 2026-04-09 18:16:57 UTC |
| Description | AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network. |
Risk And Classification
Primary CVSS: v3.1 7.1 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
EPSS: 0.000480000 probability, percentile 0.147990000 (date 2026-04-07)
Problem Types: CWE-77 | CWE-77 CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N |
| 3.1 | CNA | CVSS | 7.1 | HIGH | 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 |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
UnchangedConfidentiality
HighIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Microsoft | 365 Copilot | All | All | All | All |
| Application | Microsoft | 365 Copilot | All | All | All | All |
| Application | Microsoft | Edge | All | All | All | All |
| Application | Microsoft | Edge | All | All | All | All |
| Application | Microsoft | Excel | All | All | All | All |
| Application | Microsoft | Excel | All | All | All | All |
| Application | Microsoft | Loop | All | All | All | All |
| Application | Microsoft | Onenote | All | All | All | All |
| Application | Microsoft | Onenote | - | All | All | All |
| Application | Microsoft | Outlook | All | All | All | All |
| Application | Microsoft | Outlook | All | All | All | All |
| Application | Microsoft | Outlook | - | All | All | All |
| Application | Microsoft | Powerpoint | All | All | All | All |
| Application | Microsoft | Powerpoint | All | All | All | All |
| Application | Microsoft | Power Bi | All | All | All | All |
| Application | Microsoft | Power Bi | - | All | All | All |
| Application | Microsoft | Teams | All | All | All | All |
| Application | Microsoft | Teams | All | All | All | All |
| Application | Microsoft | Word | All | All | All | All |
| Application | Microsoft | Word | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Microsoft | Microsoft 365 Copilot For Android | affected 1.0 16.0.19815.10000 custom | Not specified |
| CNA | Microsoft | Microsoft 365 Copilot For IOS | affected 1.0 2.107.2 custom | Not specified |
| CNA | Microsoft | Microsoft Edge For Android | affected 1.0.0 145.3800.99 custom | Not specified |
| CNA | Microsoft | Microsoft Edge For IOS | affected 1.0.0.0 145.3800.99 custom | Not specified |
| CNA | Microsoft | Microsoft Excel For Android | affected 16.0.0.0 16.0.19822.20038 custom | Not specified |
| CNA | Microsoft | Microsoft Excel For IOS | affected 1.0 2.106.26020617 custom | Not specified |
| CNA | Microsoft | Microsoft Loop For IOS | affected 2.0.0 2.106.26020617 custom | Not specified |
| CNA | Microsoft | Microsoft OneNote | affected 1.0.0 2.106.26020617 custom | Not specified |
| CNA | Microsoft | Microsoft OneNote For Android | affected 16.0.1 16.0.19725.20142 custom | Not specified |
| CNA | Microsoft | Microsoft Outlook For Android | affected 1.0 5.2605 custom | Not specified |
| CNA | Microsoft | Microsoft Outlook For IOS | affected 1.0.0 5.2605 custom | Not specified |
| CNA | Microsoft | Microsoft Outlook For Mac | affected 1.0.0 5.2605 custom | Not specified |
| CNA | Microsoft | Microsoft PowerBI For Android | affected 2.0.0 2.2.260210.21290750 custom | Not specified |
| CNA | Microsoft | Microsoft PowerBI For IOS | affected 1.0.0 1.2.260302.2193910 custom | Not specified |
| CNA | Microsoft | Microsoft PowerPoint For Android | affected 16.0.0.0 16.0.19822.20038 custom | Not specified |
| CNA | Microsoft | Microsoft PowerPoint For IOS | affected 1.0 2.106.26020617 custom | Not specified |
| CNA | Microsoft | Microsoft Teams For Android | affected 1.0.0 1.0.0.2026043102 custom | Not specified |
| CNA | Microsoft | Microsoft Teams For IOS | affected 2.0.0 8.3.1 custom | Not specified |
| CNA | Microsoft | Microsoft Word For Android | affected 16.0.0.0 16.0.19822.20038 custom | Not specified |
| CNA | Microsoft | Microsoft Word For IOS | affected 2.0.0 2.106.26020617 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26133 | [email protected] | msrc.microsoft.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.