CVE-2026-45322Public exploit

Arbitrary command execution via poisoned session replay

Published May 27, 2026 · Updated May 27, 2026

OS command injection in Microsoft UFO 3.0.0 and earlier allows local users to execute PowerShell commands via poisoned session JSON. ShellReceiver.run_shell() forwards params.command to subprocess.Popen() with shell=True and powershell.exe, causing shell syntax in stored actions to be interpreted. Write access to a session/action JSON file is required; replay executes the planted command with the UFO process user's file and process access.

CVSS severity7.8
High
EPSS probability1.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Microsoft UFO 3.0.0 and earlier allows local users to execute PowerShell commands via poisoned session JSON. ShellReceiver.run_shell() forwards params.command to subprocess.Popen() with shell=True and powershell.exe, causing shell syntax in stored actions to be interpreted. Write access to a session/action JSON file is required; replay executes the planted command with the UFO process user's file and process access.

The record

CVE
CVE-2026-45322
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Microsoft
Product
UFO
Classifications
CWE-78, T1059.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 3.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · UFOversion=<= 3.0.0

Published CVSS scores

7.8GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.001PowerShell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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