EUVD-2026-93421Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L
Network-reachable MCP server (AV:N) needs only a valid API key (PR:L); injection on the host alters a separate Android device (S:C), yielding shell-user command execution (I:H, C:L, A:L).
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
5DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Authenticated command injection in Microsoft UFO's Mobile MCP server (versions prior to 3.0.9) lets a caller who holds a valid UFO_MCP_API_KEY pass shell metacharacters through the press_key tool's free-form key_code parameter and have them executed as the Android shell user on an already-authorized, connected device. Exploitation is remote and requires adb on the UFO host plus a reachable paired device, so it is not a host OS compromise, nor does it grant Android root - impact is bounded to Android shell-user privileges on the target handset. …
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Attack ChainAIDerived
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Vulnerability AssessmentAI
| Exploitation | Requires a valid UFO_MCP_API_KEY (authenticated Mobile MCP caller), adb installed on the UFO host, and a reachable, already-authorized connected Android device running UFO prior to 3.0.9. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The input assigns CVSS 9.1 (Critical), but that score is inflated largely by the scope change (S:C) and the network attack vector; the real-world priority is lower. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Microsoft UFO 3.0.9 or later; the vendor fix is available as the tagged release https://github.com/microsoft/UFO/releases/tag/v3.0.9 and as upstream commit a538791043327a0c33731d5be428867a5fd71794, which applies a strict `re.fullmatch(r"[A-Z0-9_]+", key_code)` allowlist to the press_key tool before any adb invocation - this is the primary and preferred remediation and has no functional downside for legitimate key-name or numeric keycode usage. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Microsoft UFO Mobile MCP deployments and identify any instance running a version prior to 3.0.9, restrict network reachability of the MCP endpoint to trusted hosts only, rotate every UFO_MCP_API_KEY in use, and disconnect non-essential paired Android devices; note that no public exploit identified at time of analysis, so this is risk reduction rather than incident response. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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