CVE-2026-26133: high-severity vulnerability in Microsoft 365 Copilot for Android
M365 Copilot Information Disclosure Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.4%
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
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 · Microsoft 365 Copilot for AndroidMicrosoft · Microsoft 365 Copilot for iOSMicrosoft · Microsoft Edge for AndroidMicrosoft · Microsoft Edge for iOSMicrosoft · Microsoft Excel for AndroidMicrosoft · Microsoft Excel for iOSMicrosoft · Microsoft Loop for iOSMicrosoft · Microsoft OneNoteMicrosoft · Microsoft OneNote for AndroidMicrosoft · Microsoft Outlook for AndroidMicrosoft · Microsoft Outlook for iOSMicrosoft · Microsoft Outlook for MacMicrosoft · Microsoft PowerBI for AndroidMicrosoft · Microsoft PowerBI for iOSMicrosoft · Microsoft PowerPoint for AndroidMicrosoft · Microsoft PowerPoint for iOSMicrosoft · Microsoft Teams for AndroidMicrosoft · Microsoft Teams for iOSMicrosoft · Microsoft Word for AndroidMicrosoft · Microsoft Word for iOSRelated CVEs — Microsoft 365 Copilot for Android
In the same product, most dangerous first.
CVE-2021-24100MEDIUMMicrosoft Edge for Android Information Disclosure VulnerabilityEPSS 3.1%CVE-2021-26439MEDIUMMicrosoft Edge for Android Information Disclosure VulnerabilityEPSS 2.9%CVE-2020-17153MEDIUMMicrosoft Edge for Android Spoofing VulnerabilityEPSS 2.5%CVE-2022-23258MEDIUMMicrosoft Edge for Android Spoofing VulnerabilityEPSS 1.6%CVE-2024-26196MEDIUMMicrosoft Edge for Android (Chromium-based) Information Disclosure VulnerabilityEPSS 1.2%CVE-2025-21253MEDIUMMicrosoft Edge for IOS and Android Spoofing VulnerabilityEPSS 1.2%