● Medium · CVSS 6.9

How to Fix CVE-2026-2944: Os command injection in Online Store Management System ネット店舗管理システム

Q: What is the CVSS score for CVE-2026-2944?

6.9 (Medium). Vector: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`.

Q: Where is the official advisory for CVE-2026-2944?

The vendor advisory is at [https://vuldb.com/?id.347314](https://vuldb.com/?id.347314). The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-2944.

By Sai Kiran Pandrala. Last verified: 2026-05-25.

CVE-2026-2944 is a OS command injection in Tosei Online Store Management System ネット店舗管理システム. The fix is to apply the vendor patch noted below.

⚡ At a glance


Severity	6.9 (Medium)
Actively exploited?	No public listing in CISA KEV
Affected	Online Store Management System ネット店舗管理システム 1.01
Fixed in	See vendor advisory
Type (CWE)	CWE-78: OS Command Injection

What is 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. 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 but did not respond in any way. The CVSS base score is 6.9 (Medium). The official advisory is at https://vuldb.com/?id.347314.

Am I affected?

Check the version of Online Store Management System ネット店舗管理システム you are running and compare it against the Affected row above (Online Store Management System ネット店舗管理システム 1.01). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s online-store-management-system 2>/dev/null | grep -i ^Version
rpm -q online-store-management-system 2>/dev/null
command -v online-store-management-system >/dev/null && online-store-management-system --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*Online Store Management System ネット店舗管理システム*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "Online Store Management System ネット店舗管理システム" 2>$null

How to fix CVE-2026-2944

Upgrade Online Store Management System ネット店舗管理システム to a patched build: See vendor advisory. The vendor advisory is the source of truth for the exact fixed version.

Ubuntu / Debian


sudo apt-get update
sudo apt-get install --only-upgrade online-store-management-system
dpkg -s online-store-management-system | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh online-store-management-system -y
# or for older releases:
sudo yum update online-store-management-system -y
rpm -q online-store-management-system

SUSE / openSUSE


sudo zypper refresh
sudo zypper update online-store-management-system
rpm -q online-store-management-system

Node.js / npm


# Update the affected package in your project
npm install Online Store Management System ネット店舗管理システム@latest
npm ls Online Store Management System ネット店舗管理システム
npm audit fix

PHP / Composer


composer update tosei/online-store-management-system 2>/dev/null || composer update
composer show | head -20

Complete PowerShell remediation script (Windows)


# Fix script for CVE-2026-2944 affecting Online Store Management System ネット店舗管理システム
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-2944-fix-$(Get-Date -Format yyyyMMdd-HHmmss).log"
New-Item -ItemType Directory -Force (Split-Path $LogPath) | Out-Null
Start-Transcript -Path $LogPath -Append

try {
    Write-Host "[1/4] Detect installed version"
    $pkg = Get-Package -Name "*Online Store Management System ネット店舗管理システム*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\online-store-management-system-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\Online Store Management System ネット店舗管理システム" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to See vendor advisory"
    winget upgrade --name "Online Store Management System ネット店舗管理システム" --silent --accept-source-agreements --accept-package-agreements
    if ($LASTEXITCODE -ne 0) {
        # Fallback: pull latest via OS update channel
        Install-Module -Name PSWindowsUpdate -Force -SkipPublisherCheck -ErrorAction SilentlyContinue
        Import-Module PSWindowsUpdate
        Install-WindowsUpdate -MicrosoftUpdate -AcceptAll -IgnoreReboot
    }

    Write-Host "[4/4] Verify the patched build"
    winget list --name "Online Store Management System ネット店舗管理システム"
    Write-Host "Patch applied. Reboot if prompted."
    exit 0
} catch {
    Write-Error "Patch failed: $_"
    exit 1
} finally {
    Stop-Transcript
}

Complete Bash remediation script (Linux)


#!/usr/bin/env bash
# Fix script for CVE-2026-2944 affecting Online Store Management System ネット店舗管理システム
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-2944-fix-$(date +%Y%m%d-%H%M%S).log"
exec > >(tee -a "$LOG") 2>&1

echo "[1/4] Detect installed version"
if command -v dpkg >/dev/null; then
    dpkg -s online-store-management-system 2>/dev/null | grep -i ^Version || echo "online-store-management-system not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q online-store-management-system || echo "online-store-management-system not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-2944-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/online-store-management-system /etc/online-store-management-system.d /etc/online-store-management-system.conf; do
    [ -e "$d" ] && cp -a "$d" "$BACKUP/" || true
done

echo "[3/4] Apply the upgrade (target: See vendor advisory)"
if command -v apt-get >/dev/null; then
    apt-get update
    apt-get install --only-upgrade -y online-store-management-system
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y online-store-management-system
elif command -v yum >/dev/null; then
    yum update -y online-store-management-system
elif command -v zypper >/dev/null; then
    zypper --non-interactive update online-store-management-system
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s online-store-management-system 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q online-store-management-system
fi
echo "Done. Restart any service that loaded the old library."

If you can't patch immediately

Apply at least one of the following inline controls until you can deploy the patched build. None replace the upgrade.

Restrict exposure with nftables (Linux)


# Allow only trusted CIDR to reach the affected service ports
sudo nft add table inet filter 2>/dev/null || true
sudo nft 'add chain inet filter input { type filter hook input priority 0 ; }' 2>/dev/null || true
sudo nft 'add rule inet filter input tcp dport {80, 443} ip saddr != 10.0.0.0/8 drop'
sudo nft list ruleset

Block at the host firewall (Windows)


New-NetFirewallRule -DisplayName "Block-CVE-2026-2944" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-2944"

Disable the affected service (Linux)


sudo systemctl stop online-store-management-system 2>/dev/null || true
sudo systemctl disable online-store-management-system 2>/dev/null || true

If the vendor advisory lists an official workaround, prefer that wording verbatim. If no workaround is published, the only safe remediation is the patch.

How to verify the fix worked

After upgrading, confirm the installed version matches the patched build and that no old library is still loaded by a long-running process.


# Linux
dpkg -s online-store-management-system 2>/dev/null | grep -i ^Version
rpm -q online-store-management-system 2>/dev/null || true
# Pid map check for old library handles
sudo lsof +c0 2>/dev/null | grep -i "DEL.*lib" || true


# Windows
Get-Package -Name "*Online Store Management System ネット店舗管理システム*" | Select-Object Name, Version
Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 5

Expected: the reported version is at or above See vendor advisory. Restart the affected service (systemctl restart <service> on Linux, or restart the Windows service) so it loads the patched binary.

Frequently asked questions

Other vulnerabilities in the same area that are worth patching alongside this one:

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Is CVE-2026-2944 actively exploited?

There is no public confirmation of exploitation in the wild listed in CISA KEV at the time of this writing. Patch anyway. Public exploits commonly follow disclosure within weeks.

Do I need to reboot after patching CVE-2026-2944?

For kernel and OS-level updates, yes. For most userland packages a systemctl restart <service> is enough on Linux, and restarting the Windows service or app on Windows. Any process that loaded the old library keeps using it until restarted.

What is the CVSS score for CVE-2026-2944?

6.9 (Medium). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P.

Where is the official advisory for CVE-2026-2944?

The vendor advisory is at https://vuldb.com/?id.347314. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-2944.

References

Official vendor advisory: https://vuldb.com/?id.347314
NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2944
CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Additional reference: https://vuldb.com/?ctiid.347314
Additional reference: https://vuldb.com/?submit.754579
Additional reference: https://github.com/CVE-Hunter-Leo/CVE/issues/9

*Written by Sai Kiran Pandrala. Assembled from the official vendor advisory, NVD record, and CISA KEV listing on 2026-05-25. Always confirm against the vendor's advisory before applying changes in production.*