CVE-2026-84408Network attack vector

Authenticated SYSTEM command execution via named pipe

Published Sep 16, 2026 · Updated Sep 16, 2026

Improper access control in QND Windows clients allows remote authenticated users to execute crafted commands with SYSTEM privileges via SMB. The client's named pipe accepts crafted instructions without adequately restricting which logged-in users or SMB clients may submit them. Exploitation requires access to an affected Windows PC directly or through SMB and grants command execution under the SYSTEM account.

CVSS severity8.7
High
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in QND Windows clients allows remote authenticated users to execute crafted commands with SYSTEM privileges via SMB. The client's named pipe accepts crafted instructions without adequately restricting which logged-in users or SMB clients may submit them. Exploitation requires access to an affected Windows PC directly or through SMB and grants command execution under the SYSTEM account.

The record

CVE
CVE-2026-84408
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
QualitySoft Corporation
Product
QND Premium
Classifications
CWE-782, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=0 <=Ver.11.1i

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

QualitySoft Corporation · QND Premiumversion=0 <=Ver.11.1i
QualitySoft Corporation · QND Standardversion=0 <=Ver.11.1i
QualitySoft Corporation · QND Advanceversion=0 <=Ver.11.0.9i

Published CVSS scores

8.8JPCERT/CC and IPACVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7JPCERT/CC and IPACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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.

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-782Improper Access Control
T1068Exploitation for Privilege Escalation

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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