Microsoft UFO: Command injection in Mobile MCP press_key
Summary
Microsoft UFO, an open-source automation framework, passes an unvalidated key_code parameter of the Mobile MCP press_key tool to 'adb shell input keyevent'. An authenticated caller can inject additional shell commands that run as the Android shell user on an authorized, connected Android device. Exploitation requires a valid UFO_MCP_API_KEY, adb on the host and a reachable authorized device; it does not grant host OS or Android root access.
Affected
- Microsoft UFO prior to 3.0.9
- Mobile MCP server (ufo/client/mcp/http_servers/mobile_mcp_server.py)
Fixed in
- Fixed in version 3.0.9 (per CVE record and vendor advisory GHSA-5cjx-4375-4877)
- The v3.0.9 release notes do not name this change; verify against the fix commit
Workaround
Unknown. No vendor workaround documented; upgrading is the fix.
Exploitation
- CISA SSVC lists exploitation as 'poc' and automatable as 'no'
- No public proof of concept confirmed in the sources
- No evidence of active exploitation found
Our recommendation
- Upgrade UFO to version 3.0.9 or later (preferably the latest release)
- Check whether the Mobile MCP HTTP service is reachable from untrusted networks and restrict access
- Restrict who holds UFO_MCP_API_KEY and rotate it if compromise is suspected
- Limit adb authorizations to dedicated test devices and remove unneeded ones
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- GitHub Security Advisory GHSA-5cjx-4375-4877 github.com
- Fix commit a538791 github.com
- UFO release v3.0.9 github.com
- UFO releases github.com
- OSV entry CVE-2026-105793 osv.dev
- Vulners CVE-2026-105793 vulners.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 07:25.
Original description (NVD)
Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the press_key tool in ufo/client/mcp/http_servers/mobile_mcp_server.py accepts a free-form key_code parameter and passes it to `adb shell input keyevent`. The adb client joins the arguments into a remote command string that the Android shell reparses, allowing an authenticated Mobile MCP caller to execute additional commands as the Android shell user on an authorized connected device. Exploitation requires a valid UFO_MCP_API_KEY, adb on the host, and a reachable authorized device, and it does not establish host operating-system execution, Android root execution, or access beyond the Android shell-user privileges. This issue is fixed in version 3.0.9.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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