● Critical · CVSS 9.4

How to Fix CVE-2026-2330: Cwe-552 files or directories accessible to external parties in SICK Lector85x

Q: What is the CVSS score for CVE-2026-2330?

9.4 (Critical). Vector: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H`.

Q: Where is the official advisory for CVE-2026-2330?

The vendor advisory is at [https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.pdf](https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.pdf). The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-2330.

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

CVE-2026-2330 is a cwe-552 files or directories accessible to external parties in SICK AG SICK Lector85x. The fix is to apply the vendor patch noted below.

⚡ At a glance


Severity	9.4 (Critical)
Actively exploited?	No public listing in CISA KEV
Affected	SICK Lector85x 0 to <2.8.0; SICK Lector83x 0 to <2.8.0
Fixed in	See vendor advisory
Type (CWE)	CWE-552 Files or Directories Accessible to External Parties

What is CVE-2026-2330?

An attacker may access restricted filesystem areas on the device via the CROWN REST interface due to incomplete whitelist enforcement. Certain directories intended for internal testing were not covered by the whitelist and are accessible without authentication. An unauthenticated attacker could place a manipulated parameter file that becomes active after a reboot, allowing modification of critical device settings, including network configuration and application parameters. The CVSS base score is 9.4 (Critical), which puts this in the upper risk band and warrants a fast patch cycle. The official advisory is at https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.pdf.

Am I affected?

Check the version of SICK Lector85x you are running and compare it against the Affected row above (SICK Lector85x 0 to <2.8.0; SICK Lector83x 0 to <2.8.0). If your build sits inside the affected range, you must patch.

Run the version check that fits your platform:


# Linux package check
dpkg -s sick-lector85x 2>/dev/null | grep -i ^Version
rpm -q sick-lector85x 2>/dev/null
command -v sick-lector85x >/dev/null && sick-lector85x --version 2>/dev/null


# Windows (PowerShell)
Get-Package -Name "*SICK Lector85x*" -ErrorAction SilentlyContinue | Select-Object Name, Version
winget list --name "SICK Lector85x" 2>$null

How to fix CVE-2026-2330

Upgrade SICK Lector85x 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 sick-lector85x
dpkg -s sick-lector85x | grep -i ^Version

RHEL / CentOS / Rocky / AlmaLinux


sudo dnf upgrade --refresh sick-lector85x -y
# or for older releases:
sudo yum update sick-lector85x -y
rpm -q sick-lector85x

SUSE / openSUSE


sudo zypper refresh
sudo zypper update sick-lector85x
rpm -q sick-lector85x

Complete PowerShell remediation script (Windows)


# Fix script for CVE-2026-2330 affecting SICK Lector85x
# Run as administrator. Detect -> backup -> upgrade -> verify -> log.

$ErrorActionPreference = "Stop"
$LogPath  = "C:\Logs\CVE-2026-2330-fix-$(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"
    $pkg = Get-Package -Name "*SICK Lector85x*" -ErrorAction SilentlyContinue
    if ($pkg) { $pkg | Format-Table Name, Version }
    else { Write-Host "Not detected via Get-Package; try winget list" }

    Write-Host "[2/4] Backup configuration"
    $backup = "C:\Backup\sick-lector85x-$(Get-Date -Format yyyyMMdd)"
    New-Item -ItemType Directory -Force $backup | Out-Null
    Get-ChildItem "C:\ProgramData\SICK Lector85x" -ErrorAction SilentlyContinue |
        Copy-Item -Destination $backup -Recurse -Force -ErrorAction SilentlyContinue

    Write-Host "[3/4] Apply the upgrade to See vendor advisory"
    winget upgrade --name "SICK Lector85x" --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 "SICK Lector85x"
    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-2026-2330 affecting SICK Lector85x
# Detect -> backup -> upgrade -> verify -> log.

set -euo pipefail
LOG="/var/log/cve-2026-2330-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 sick-lector85x 2>/dev/null | grep -i ^Version || echo "sick-lector85x not installed via dpkg"
elif command -v rpm >/dev/null; then
    rpm -q sick-lector85x || echo "sick-lector85x not installed via rpm"
fi

echo "[2/4] Backup configuration"
BACKUP="/root/backup-cve-2026-2330-$(date +%Y%m%d)"
mkdir -p "$BACKUP"
for d in /etc/sick-lector85x /etc/sick-lector85x.d /etc/sick-lector85x.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 sick-lector85x
elif command -v dnf >/dev/null; then
    dnf upgrade --refresh -y sick-lector85x
elif command -v yum >/dev/null; then
    yum update -y sick-lector85x
elif command -v zypper >/dev/null; then
    zypper --non-interactive update sick-lector85x
fi

echo "[4/4] Verify the patched build"
if command -v dpkg >/dev/null; then
    dpkg -s sick-lector85x 2>/dev/null | grep -i ^Version
elif command -v rpm >/dev/null; then
    rpm -q sick-lector85x
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-2026-2330" -Direction Inbound -Action Block -Protocol TCP -LocalPort 80,443 -RemoteAddress Any -Enabled True
Get-NetFirewallRule -DisplayName "Block-CVE-2026-2330"

Disable the affected service (Linux)


sudo systemctl stop sick-lector85x 2>/dev/null || true
sudo systemctl disable sick-lector85x 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 sick-lector85x 2>/dev/null | grep -i ^Version
rpm -q sick-lector85x 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 "*SICK Lector85x*" | 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

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How to Fix CVE-2026-5110: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') — CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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How to Fix CVE-2026-4599: Path Traversal in jsrsasign , Path Traversal in jsrsasign
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Is CVE-2026-2330 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-2026-2330?

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-2026-2330?

9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H.

Where is the official advisory for CVE-2026-2330?

The vendor advisory is at https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.pdf. The NVD record is at https://nvd.nist.gov/vuln/detail/CVE-2026-2330.

References

Official vendor advisory: https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.pdf
NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2330
CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Additional reference: https://www.sick.com/psirt
Additional reference: https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
Additional reference: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

*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.*