Vulnerability · Published May 12, 2026 · Assigned by microsoft
CVE-2026-42893Microsoft Outlook for iOS Tampering Vulnerability
High 7.4
In plain English
A high-severity command injection in Microsoft Outlook for iOS from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.4%top 65.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Outlook for iOS | 1.0.0 – before 5.2617.1 |
Weakness: CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C
References
- Microsoft Outlook for iOS Tampering Vulnerability vendor-advisory, patch