RCE in Microsoft 365 Copilot For Android
CVE-2026-26133
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.001 (17.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: 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.
Affected products
- Microsoft 365 Copilot For Android — versions 1.0
- Microsoft 365 Copilot For Ios — versions 1.0
- Microsoft Edge For Android — versions 1.0.0
- Microsoft Edge For Ios — versions 1.0.0.0
- Microsoft Excel For Android — versions 16.0.0.0
- Microsoft Excel For Ios — versions 1.0
- Microsoft Loop For Ios — versions 2.0.0
- Microsoft Onenote — versions 1.0.0
- Microsoft Onenote For Android — versions 16.0.1
- Microsoft Outlook For Android — versions 1.0
Weakness classification (CWE)
References
- M365 Copilot Information Disclosure Vulnerability (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-26133?
- CVE-2026-26133 is a high-severity vulnerability in Microsoft 365 Copilot For Android, classified under Command Injection. CVSS score: 7.1/10. Published 2026-03-13.
- How severe is CVE-2026-26133?
- High severity. CVSS v3 base score is 7.1 out of 10.