CVE-2026-2944: A security flaw has been discovered in Tosei Online Store Management System ネット店舗管理システム 1.01

This week

HIGH 7.3REMOTEDOWNGRADE

CVE-2026-2944 is a high-severity flaw (CVSS 7.3) affecting online store management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A security flaw has been discovered in Tosei Online Store Management System ネット店舗管理システム 1.01. Affected is the function system of the file /cgi-bin/monitor.php of the component HTTP POST Request Handler. Performing a manipulation of the argument DevId results in os command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure bu

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	6.9% (top 6%)
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2026-02-22
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: tosei-corporation

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-22 11:16 UTCPublished CVE record published
2026-06-17 10:32 UTCUpdated Record last modified

tosei-corporation online store management system DOWNGRADE

Affected: 1.01

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.01

1. Check installed version

apt-cache policy online-store-management-system || rpm -q online-store-management-system || online-store-management-system --version

2. No fixed release: DOWNGRADE to a release before 1.01 (Debian / Ubuntu)

apt-cache madison online-store-management-system sudo apt install online-store-management-system=<VERSION_BEFORE_1.01> sudo apt-mark hold online-store-management-system

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list online-store-management-system sudo dnf downgrade online-store-management-system-<VERSION_BEFORE_1.01> sudo dnf versionlock add online-store-management-system

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · python-configargparse · FIXED · 1.9.0-1.fc46 · FEDORA-2026-3ab7c44443 · source

sudo dnf upgrade --advisory=FEDORA-2026-3ab7c44443

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/CVE-Hunter-Leo/CVE/issues/9

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-2944?

online store management system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-2944 being exploited?

CVE-2026-2944 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-2944 affect?

CVE-2026-2944 affects online store management system. Severity is high (CVSS 7.3). A security flaw has been discovered in Tosei Online Store Management System ネット店舗管理システム 1.01. Affected is the function system of the file /cgi-bin/monitor.php of the component HTTP POST Request Handler. Performing a manipulation of the argu

How urgent is CVE-2026-2944?

Priority 59/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-1192 HIGH 7.3 DOWNGRADE A vulnerability was determined in Tosei Online Store Management System ネット店舗管理システム 1.01
CVE-2024-7898 HIGH 7.3 DOWNGRADE A vulnerability classified as critical was found in Tosei Online Store Management System ネット店舗管理システム 4.02/4.03
CVE-2024-7897 MEDIUM 6.3 DOWNGRADE A vulnerability classified as critical has been found in Tosei Online Store Management System ネット店舗管理システム 4.02
CVE-2024-7896 MEDIUM 6.3 DOWNGRADE A vulnerability was found in Tosei Online Store Management System ネット店舗管理システム 4.02/4.03/4.04

References

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