CVE-2026-22646
📋 TL;DR
This CVE describes an information disclosure vulnerability where error messages reveal internal system details like file paths, database errors, or software versions. Attackers can use this reconnaissance information to map the application's internal structure and discover more critical vulnerabilities. This affects systems running vulnerable versions of SICK products with exposed error messages.
💻 Affected Systems
- SICK products with vulnerable error handling
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers use disclosed information to discover and exploit more severe vulnerabilities like SQL injection, path traversal, or authentication bypass, potentially leading to full system compromise.
Likely Case
Attackers gather reconnaissance data about the application's architecture, software stack, and internal paths, enabling targeted attacks against discovered weaknesses.
If Mitigated
Limited information disclosure with no direct path to system compromise, though some reconnaissance value remains.
🎯 Exploit Status
Exploitation requires triggering error conditions that reveal sensitive information. No authentication needed if error messages are exposed to unauthenticated users.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific fixed versions
Vendor Advisory: https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0002.json
Restart Required: Yes
Instructions:
1. Review vendor advisory at provided URL
2. Identify affected products and versions
3. Apply vendor-recommended patches
4. Restart affected services
5. Verify error messages no longer expose internal details
🔧 Temporary Workarounds
Generic Error Message Configuration
allConfigure application to return generic error messages to users instead of detailed system information
Application-specific configuration - consult documentation for error handling settings
Web Server Error Page Customization
linuxConfigure web server to serve custom error pages that don't reveal internal details
For Apache: ErrorDocument directives in httpd.conf
For Nginx: error_page directives in nginx.conf
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to filter error messages containing sensitive information
- Isolate vulnerable systems behind reverse proxies that sanitize error responses
🔍 How to Verify
Check if Vulnerable:
Trigger application errors (e.g., invalid inputs, malformed requests) and check if responses contain internal paths, stack traces, or version detailsCheck Version:
Application-specific - consult vendor documentation for version checkingVerify Fix Applied:
After patching, trigger the same error conditions and verify responses contain only generic error messages without internal details📡 Detection & Monitoring
Log Indicators:
- Error messages in logs containing file paths, stack traces, or internal system details
- Multiple error requests from single sources
Network Indicators:
- HTTP responses with detailed error information in body
- Responses containing paths like /var/www/, C:\Program Files\, or database error codes
SIEM Query:
http.response_code >= 400 AND (http.response_body CONTAINS "/var/" OR http.response_body CONTAINS "C:\\" OR http.response_body CONTAINS "SQLSTATE")🔗 References
- https://sick.com/psirt
- https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
- https://www.first.org/cvss/calculator/3.1
- https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0002.json
- https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0002.pdf
- https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
