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CVE-2026-105791— Microsoft UFO: Arbitrary code execution in `run_shell` via `explorer.exe` argument injection

Quick assessment

Affected
microsoft UFO
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft UFO 是一个跨设备和平台的开源智能自动化框架。在 3.0.9 版本之前，ufo/client/mcp/local_servers/cli_mcp_server.py 中 CommandLineExecutor 组件的 run_shell 工具仅对 bash_command 参数的第一个令牌进行验证，并允许执行 explorer.exe。在 Windows 系统上，explorer.exe 会将其后续的路径参数委托给 ShellExecute，因此即使子进程使用 shell=False，攻击者通

CVSS 7.5 · High
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I. Basic Information for CVE-2026-105791

Vulnerability Information
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Vulnerability Title
Microsoft UFO: Arbitrary code execution in `run_shell` via `explorer.exe` argument injection
Source: CVE Program / CVE List V5
Vulnerability Description
Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the run_shell tool in the CommandLineExecutor component of ufo/client/mcp/local_servers/cli_mcp_server.py validates only the first token of the bash_command parameter and permits explorer.exe. On Windows, explorer.exe delegates its following path argument to ShellExecute, so an attacker-influenced agent call can launch an arbitrary executable or script as the desktop user even though the subprocess uses shell=False. Exploitation depends on a user running an affected agent workflow and on inducing the tool call, but successful execution can access or modify that user's files, tokens, and sessions. This issue is fixed in version 3.0.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
microsoft UFO < 3.0.9 -

II. Public POCs for CVE-2026-105791

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III. Intelligence Information for CVE-2026-105791

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Other References for CVE-2026-105791 (3)

Same Patch Batch · microsoft · 2026-10-06 · 11 CVEs total

CVE-2026-105794 9.1 CRITICAL MsQuic: Improper Certificate Validation in Microsoft.Native.Quic.MsQuic.OpenSSL
CVE-2026-105793 9.1 CRITICAL Microsoft UFO: Authenticated Android shell command injection in Mobile MCP `press_key`
CVE-2026-105797 8.8 HIGH SimpleChat: Command injection via authorization-gate ordering flaw (arbitrary process spaw
CVE-2026-105796 8.8 HIGH Kiota: Code injection through doc-comment delimiter reformation in Kiota Java and PHP gene
CVE-2026-105788 8.8 HIGH Microsoft UFO: Authenticated Android shell command injection in Mobile MCP type_text and l
CVE-2026-105798 8.7 HIGH SimpleChat: Stored XSS via group document filename in inline onclick handler
CVE-2026-105792 6.5 MEDIUM Microsoft UFO: Authenticated task-result request can deadlock UFO server session manager
CVE-2026-105790 6.4 MEDIUM Microsoft UFO: Authenticated Galaxy device registration can bypass WebSocket SSRF IP pinni
CVE-2026-105789 5.4 MEDIUM Microsoft UFO: Arbitrary file write in the Linux MCP `execute_command` tool
CVE-2026-105795 3.1 LOW Kiota: Unsafe oauth_card_path references in Kiota-generated API plugin manifests

IV. Related Vulnerabilities

Same product: UFO
Same vendor: microsoft
Same weakness: CWE-88

V. Comments for CVE-2026-105791

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