CVE-2026-37452Public exploit

SYSTEM privilege escalation via unchecked process launch

Published Jun 25, 2026 · Updated Jun 25, 2026

Privilege escalation in MSI NBFoundation Service 2.0.2506.1201 and earlier allows local users to run arbitrary processes as SYSTEM. The PC:REXE handler accepts an attacker-controlled executable path and arguments from the MSI_SERVICE_2 named pipe, then StartProcessAndBypassUAC launches them with a duplicated winlogon token without meaningful validation. Any authenticated low-privileged Windows user who can access the permissive pipe can gain full SYSTEM privileges.

CVSS severity7.5
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in MSI NBFoundation Service 2.0.2506.1201 and earlier allows local users to run arbitrary processes as SYSTEM. The PC:REXE handler accepts an attacker-controlled executable path and arguments from the MSI_SERVICE_2 named pipe, then StartProcessAndBypassUAC launches them with a duplicated winlogon token without meaningful validation. Any authenticated low-privileged Windows user who can access the permissive pipe can gain full SYSTEM privileges.

The record

CVE
CVE-2026-37452
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1068Exploitation for Privilege Escalation

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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