High 7.5Published Oct 6, 2026

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

Updated under an hour ago (2026-10-19 08:30 UTC)

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It affects microsoft UFO. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.62%, higher than 49% of scored CVEs.

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-88, CWE-184
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.62% (percentile 49)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

microsoft UFO microsoft:ufo (from the name)	before 3.0.9	CNA record

References

https://github.com/microsoft/UFO/security/advisories/GHSA-cmq9-vqjf-4q2qx-refsource-confirm
https://github.com/microsoft/UFO/commit/3e1262fc091eb319253b7a1338b63f62cc6c82b1x-refsource-misc
https://github.com/microsoft/UFO/releases/tag/v3.0.9x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.