What’s Vulnerable › Vulnerabilities
CVE-2026-42893: Microsoft Outlook for iOS Tampering Vulnerability
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-12 · updated 2026-10-26
- Weakness: CWE-77
Description
Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to perform tampering over a network.
Affected products
- Microsoft Outlook: before 5.2617.1 — fixed in 5.2617.1
- Microsoft Outlook: from 1.0.0 before 5.2617.1 — fixed in 5.2617.1
How to fix
Upgrade to a fixed version: Microsoft Outlook 5.2617.1; Microsoft Outlook 5.2617.1. Check the vendor advisory for mitigations.
References
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