⚠ Reference material — not professional advice. Test in staging, back up first, verify against your specific version. Use your own judgment for your environment.
● Medium · CVSS 5.3

How to Fix CVE-2026-28769: Path traversal in SFX Series SuperFlex Satellite Receiver Web management interface

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

CVE-2026-28769 is a path traversal in International Datacasting Corporation (IDC) SFX Series SuperFlex Satellite Receiver Web management interface. The fix is to upgrade to SFX Series SuperFlex Satellite Receiver Web management interface 101.

⚡ At a glance
Severity5.3 (Medium)
Actively exploited?No public listing in CISA KEV
AffectedSee vendor advisory
Fixed inSFX Series SuperFlex Satellite Receiver Web management interface 101
Type (CWE)CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

What is CVE-2026-28769?

A path traversal vulnerability exists in the /IDC_Logging/checkifdone.cgi script in International Datacasting Corporation (IDC) SFX Series SuperFlex Satellite Receiver Web management portal version 101. An authenticated attacker can manipulate the file parameter to traverse directories and enumerate arbitrary files on the underlying filesystem. Due to the insecure perl file path handling function in use, a authenticated actor is able to preform directory traversal, with the backup endpoint confirming a file exists by indicating that a backup operation was successful or when using the path of a non existent file, the returned status is failed. The CVSS base score is 5.3 (Medium). The official advisory is at https://www.abdulmhsblog.com/posts/sfx2100-vulns/.

Am I affected?

Check the version of SFX Series SuperFlex Satellite Receiver Web management interface you are running and compare it against the Affected row above (See vendor advisory). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s sfx-series-superflex-satellite-receiver-web-management-interface 2>/dev/null | grep -i ^Version
rpm -q sfx-series-superflex-satellite-receiver-web-management-interface 2>/dev/null
command -v sfx-series-superflex-satellite-receiver-web-management-interface >/dev/null && sfx-series-superflex-satellite-receiver-web-management-interface --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*SFX Series SuperFlex Satellite Receiver Web management interface*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "SFX Series SuperFlex Satellite Receiver Web management interface" 2>$null

How to fix CVE-2026-28769

Upgrade SFX Series SuperFlex Satellite Receiver Web management interface to a patched build: SFX Series SuperFlex Satellite Receiver Web management interface 101. 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 sfx-series-superflex-satellite-receiver-web-management-interface
dpkg -s sfx-series-superflex-satellite-receiver-web-management-interface | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh sfx-series-superflex-satellite-receiver-web-management-interface -y
# or for older releases:
sudo yum update sfx-series-superflex-satellite-receiver-web-management-interface -y
rpm -q sfx-series-superflex-satellite-receiver-web-management-interface

SUSE / openSUSE


sudo zypper refresh
sudo zypper update sfx-series-superflex-satellite-receiver-web-management-interface
rpm -q sfx-series-superflex-satellite-receiver-web-management-interface

Node.js / npm


# Update the affected package in your project
npm install SFX Series SuperFlex Satellite Receiver Web management interface@latest
npm ls SFX Series SuperFlex Satellite Receiver Web management interface
npm audit fix

Complete PowerShell remediation script (Windows)


# Fix script for CVE-2026-28769 affecting SFX Series SuperFlex Satellite Receiver Web management interface
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-28769-fix-$(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"
    $pkg = Get-Package -Name "*SFX Series SuperFlex Satellite Receiver Web management interface*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\sfx-series-superflex-satellite-receiver-web-management-interface-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\SFX Series SuperFlex Satellite Receiver Web management interface" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to SFX Series SuperFlex Satellite Receiver Web management interface 101"
    winget upgrade --name "SFX Series SuperFlex Satellite Receiver Web management interface" --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 "SFX Series SuperFlex Satellite Receiver Web management interface"
    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-2026-28769 affecting SFX Series SuperFlex Satellite Receiver Web management interface
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-28769-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 sfx-series-superflex-satellite-receiver-web-management-interface 2>/dev/null | grep -i ^Version || echo "sfx-series-superflex-satellite-receiver-web-management-interface not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q sfx-series-superflex-satellite-receiver-web-management-interface || echo "sfx-series-superflex-satellite-receiver-web-management-interface not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-28769-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/sfx-series-superflex-satellite-receiver-web-management-interface /etc/sfx-series-superflex-satellite-receiver-web-management-interface.d /etc/sfx-series-superflex-satellite-receiver-web-management-interface.conf; do
    [ -e "$d" ] && cp -a "$d" "$BACKUP/" || true
done

echo "[3/4] Apply the upgrade (target: SFX Series SuperFlex Satellite Receiver Web management interface 101)"
if command -v apt-get >/dev/null; then
    apt-get update
    apt-get install --only-upgrade -y sfx-series-superflex-satellite-receiver-web-management-interface
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y sfx-series-superflex-satellite-receiver-web-management-interface
elif command -v yum >/dev/null; then
    yum update -y sfx-series-superflex-satellite-receiver-web-management-interface
elif command -v zypper >/dev/null; then
    zypper --non-interactive update sfx-series-superflex-satellite-receiver-web-management-interface
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s sfx-series-superflex-satellite-receiver-web-management-interface 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q sfx-series-superflex-satellite-receiver-web-management-interface
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-2026-28769" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-28769"

Disable the affected service (Linux)


sudo systemctl stop sfx-series-superflex-satellite-receiver-web-management-interface 2>/dev/null || true
sudo systemctl disable sfx-series-superflex-satellite-receiver-web-management-interface 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 sfx-series-superflex-satellite-receiver-web-management-interface 2>/dev/null | grep -i ^Version
rpm -q sfx-series-superflex-satellite-receiver-web-management-interface 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 "*SFX Series SuperFlex Satellite Receiver Web management interface*" | Select-Object Name, Version
Get-HotFix | Sort-Object InstalledOn -Descending | Select-Object -First 5

Expected: the reported version is at or above SFX Series SuperFlex Satellite Receiver Web management interface 101. 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:

Is CVE-2026-28769 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-2026-28769?

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-2026-28769?

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

Where is the official advisory for CVE-2026-28769?

The vendor advisory is at https://www.abdulmhsblog.com/posts/sfx2100-vulns/. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-28769.

References

*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.*