MSRC_CVE-2026-26133
Vulnerability from csaf_microsoft - Published: 2026-03-10 07:00 - Updated: 2026-04-09 07:00Summary
M365 Copilot Information Disclosure Vulnerability
Severity
Important
Notes
Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
Customer Action: Required. The vulnerability documented by this CVE requires customer action to resolve.
CWE-77
- Improper Neutralization of Special Elements used in a Command ('Command Injection')
Vendor Fix
2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-onenote/id410395246?platform=mac
https://apps.apple.com/us/app/microsoft-onenote/i…
Vendor Fix
5.2605:Security Update:https://go.microsoft.com/fwlink/p/?linkid=831049
https://go.microsoft.com/fwlink/p/?linkid=831049
Vendor Fix
5.2605:Security Update:https://learn.microsoft.com/en-us/officeupdates/release-notes-outlook-mobile
https://learn.microsoft.com/en-us/officeupdates/r…
Vendor Fix
2.107.2:Security Update:https://apps.apple.com/us/app/microsoft-365-copilot/id541164041
https://apps.apple.com/us/app/microsoft-365-copil…
Vendor Fix
145.3800.99:Security Update:https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security
https://docs.microsoft.com/en-us/DeployEdge/micro…
Vendor Fix
8.3.1:Security Update:https://apps.apple.com/us/app/microsoft-teams/id1113153706
https://apps.apple.com/us/app/microsoft-teams/id1…
Vendor Fix
1.0.0.2026043102:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.teams
https://play.google.com/store/apps/details?id=com…
Vendor Fix
16.0.19822.20038:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.office.excel&hl=en_US
https://play.google.com/store/apps/details?id=com…
Vendor Fix
16.0.19822.20038:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.office.word&hl=en_US
https://play.google.com/store/apps/details?id=com…
Vendor Fix
2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-powerpoint/id586449534?platform=mac
https://apps.apple.com/us/app/microsoft-powerpoin…
Vendor Fix
2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-word/id462054704?mt=12
https://apps.apple.com/us/app/microsoft-word/id46…
Vendor Fix
2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-loop/id1637682491
https://apps.apple.com/us/app/microsoft-loop/id16…
Vendor Fix
5.2605:Security Update:https://apps.apple.com/ca/app/microsoft-outlook/id951937596
https://apps.apple.com/ca/app/microsoft-outlook/i…
Vendor Fix
16.0.19815.10000:Security Update:https://play.google.com/store/search?q=copilot+365&c=apps
https://play.google.com/store/search?q=copilot+36…
Vendor Fix
2.2.260210.21290750:Security Update:https://play.google.com/store/search?q=powerbi&c=apps
https://play.google.com/store/search?q=powerbi&c=apps
Vendor Fix
1.2.260302.2193910:Security Update:https://apps.apple.com/us/app/microsoft-power-bi/id929738808
https://apps.apple.com/us/app/microsoft-power-bi/…
Vendor Fix
16.0.19725.20142:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.office.onenote
https://play.google.com/store/apps/details?id=com…
Vendor Fix
16.0.19822.20038:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.office.powerpoint&hl=en_US
https://play.google.com/store/apps/details?id=com…
Vendor Fix
2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-excel/id586683407?platform=mac
https://apps.apple.com/us/app/microsoft-excel/id5…
References
Acknowledgments
Andi Ahmeti <a href="(https://www.linkedin.com/in/andi-ahmeti/)"></a> with Permiso Security <a href="(https://permiso.io/)/"></a>
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"title": "According to the CVSS metrics, successful exploitation of this vulnerability could lead to major loss of confidentiality (C:H), and some loss of integrity (I:L), but no loss of availability (A:N). What does that mean for this vulnerability?"
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"date": "2026-03-12T07:00:00.000Z",
"details": "16.0.19822.20038:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.office.excel\u0026hl=en_US",
"product_ids": [
"13"
],
"url": "https://play.google.com/store/apps/details?id=com.microsoft.office.excel\u0026hl=en_US"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "16.0.19822.20038:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.office.word\u0026hl=en_US",
"product_ids": [
"18"
],
"url": "https://play.google.com/store/apps/details?id=com.microsoft.office.word\u0026hl=en_US"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-powerpoint/id586449534?platform=mac",
"product_ids": [
"3"
],
"url": "https://apps.apple.com/us/app/microsoft-powerpoint/id586449534?platform=mac"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-word/id462054704?mt=12",
"product_ids": [
"2"
],
"url": "https://apps.apple.com/us/app/microsoft-word/id462054704?mt=12"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-loop/id1637682491",
"product_ids": [
"1"
],
"url": "https://apps.apple.com/us/app/microsoft-loop/id1637682491"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "5.2605:Security Update:https://apps.apple.com/ca/app/microsoft-outlook/id951937596",
"product_ids": [
"19"
],
"url": "https://apps.apple.com/ca/app/microsoft-outlook/id951937596"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "16.0.19815.10000:Security Update:https://play.google.com/store/search?q=copilot+365\u0026c=apps",
"product_ids": [
"7"
],
"url": "https://play.google.com/store/search?q=copilot+365\u0026c=apps"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "2.2.260210.21290750:Security Update:https://play.google.com/store/search?q=powerbi\u0026c=apps",
"product_ids": [
"6"
],
"url": "https://play.google.com/store/search?q=powerbi\u0026c=apps"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "1.2.260302.2193910:Security Update:https://apps.apple.com/us/app/microsoft-power-bi/id929738808",
"product_ids": [
"5"
],
"url": "https://apps.apple.com/us/app/microsoft-power-bi/id929738808"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "16.0.19725.20142:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.office.onenote",
"product_ids": [
"11"
],
"url": "https://play.google.com/store/apps/details?id=com.microsoft.office.onenote"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "16.0.19822.20038:Security Update:https://play.google.com/store/apps/details?id=com.microsoft.office.powerpoint\u0026hl=en_US",
"product_ids": [
"12"
],
"url": "https://play.google.com/store/apps/details?id=com.microsoft.office.powerpoint\u0026hl=en_US"
},
{
"category": "vendor_fix",
"date": "2026-03-12T07:00:00.000Z",
"details": "2.106.26020617:Security Update:https://apps.apple.com/us/app/microsoft-excel/id586683407?platform=mac",
"product_ids": [
"4"
],
"url": "https://apps.apple.com/us/app/microsoft-excel/id586683407?platform=mac"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"environmentalsScore": 0.0,
"exploitCodeMaturity": "UNPROVEN",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"remediationLevel": "OFFICIAL_FIX",
"reportConfidence": "CONFIRMED",
"scope": "UNCHANGED",
"temporalScore": 6.2,
"userInteraction": "REQUIRED",
"vectorString": "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",
"version": "3.1"
},
"products": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"10",
"11",
"12",
"13",
"14",
"15",
"16",
"17",
"18",
"19",
"20"
]
}
],
"threats": [
{
"category": "impact",
"details": "Information Disclosure"
},
{
"category": "exploit_status",
"details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
}
],
"title": "M365 Copilot Information Disclosure Vulnerability"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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