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Fencer Vulns
high 7.1

CVE-2026-26133 json

M365 Copilot Information Disclosure Vulnerability

published 2026-03-13 7 mo ago modified 2026-06-19 4 mo ago also EUVD-2026-12111

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.

Patch / fix

  • Microsoft Microsoft 365 Copilot for Android 16.0.19815.10000
  • Microsoft Microsoft 365 Copilot for iOS 2.107.2
  • Microsoft Microsoft Edge for Android 145.3800.99
  • Microsoft Microsoft Edge for iOS 145.3800.99
  • Microsoft Microsoft Excel for Android 16.0.19822.20038
  • Microsoft Microsoft Excel for iOS 2.106.26020617
  • Microsoft Microsoft Loop for iOS 2.106.26020617
  • Microsoft Microsoft OneNote 2.106.26020617
  • Microsoft Microsoft OneNote for Android 16.0.19725.20142
  • Microsoft Microsoft Outlook for Android 5.2605
  • Microsoft Microsoft Outlook for iOS 5.2605
  • Microsoft Microsoft Outlook for Mac 5.2605
  • Microsoft Microsoft PowerBI for Android 2.2.260210.21290750
  • Microsoft Microsoft PowerBI for iOS 1.2.260302.2193910
  • Microsoft Microsoft PowerPoint for Android 16.0.19822.20038
  • Microsoft Microsoft PowerPoint for iOS 2.106.26020617
  • Microsoft Microsoft Teams for Android 1.0.0.2026043102
  • Microsoft Microsoft Teams for iOS 8.3.1
  • Microsoft Microsoft Word for Android 16.0.19822.20038
  • Microsoft Microsoft Word for iOS 2.106.26020617

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 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 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Affected products

  • Microsoft Microsoft 365 Copilot for Android
  • Microsoft Microsoft 365 Copilot for iOS
  • Microsoft Microsoft Edge for Android
  • Microsoft Microsoft Edge for iOS
  • Microsoft Microsoft Excel for Android
  • Microsoft Microsoft Excel for iOS
  • Microsoft Microsoft Loop for iOS
  • Microsoft Microsoft OneNote
  • Microsoft Microsoft OneNote for Android
  • Microsoft Microsoft Outlook for Android
  • Microsoft Microsoft Outlook for iOS
  • Microsoft Microsoft Outlook for Mac
  • Microsoft Microsoft PowerBI for Android
  • Microsoft Microsoft PowerBI for iOS
  • Microsoft Microsoft PowerPoint for Android
  • Microsoft Microsoft PowerPoint for iOS
  • Microsoft Microsoft Teams for Android
  • Microsoft Microsoft Teams for iOS
  • Microsoft Microsoft Word for Android
  • Microsoft Microsoft Word for iOS

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.