CVE-2026-56437

SYSTEM code execution via installer DLL search

Published Jul 8, 2026 · Updated Jul 8, 2026

Uncontrolled DLL search handling in Fuji Electric Pupsman before 3.9.0 allows attackers to execute code as SYSTEM on Windows. The Windows installer uses an uncontrolled search path that loads a crafted DLL placed in the same folder as the installer. Exploitation requires a victim to place that DLL beside the installer and execute the installer, granting the loaded code SYSTEM privileges.

CVSS severity8.4
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled DLL search handling in Fuji Electric Pupsman before 3.9.0 allows attackers to execute code as SYSTEM on Windows. The Windows installer uses an uncontrolled search path that loads a crafted DLL placed in the same folder as the installer. Exploitation requires a victim to place that DLL beside the installer and execute the installer, granting the loaded code SYSTEM privileges.

The record

CVE
CVE-2026-56437
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
Fuji Electric
Product
Pupsman
Classifications
CWE-427, T1574.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 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=prior to 3.9.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Fuji Electric · Pupsmanversion=prior to 3.9.0

Published CVSS scores

8.4JPCERT/CCCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8JPCERT/CCCVSS:3.0/AV:L/AC:L/PR:N/UI:R/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
T1574.001DLL Search Order Hijacking

Public exploit references

No public exploit references are available in this record.

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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