CVE-2026-22917
📋 TL;DR
This vulnerability involves improper input handling in a system endpoint that allows attackers to send crafted requests to overload resources, causing a denial of service. Systems running affected SICK products with vulnerable configurations are impacted. The CVSS score of 4.3 indicates medium severity.
💻 Affected Systems
- Specific SICK products not detailed in provided references
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system unavailability affecting critical operations, potentially disrupting industrial control systems or production lines.
Likely Case
Temporary service degradation or intermittent outages affecting specific endpoints or services.
If Mitigated
Minimal impact with proper rate limiting, input validation, and resource monitoring in place.
🎯 Exploit Status
Denial of service vulnerabilities typically have low exploitation complexity when unauthenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: https://sick.com/psirt
Restart Required: Yes
Instructions:
1. Check SICK PSIRT for specific patch information. 2. Download appropriate firmware/software updates. 3. Apply updates following vendor instructions. 4. Restart affected systems.
🔧 Temporary Workarounds
Implement Rate Limiting
allConfigure rate limiting on vulnerable endpoints to prevent request flooding
# Configuration depends on specific system/application
Network Segmentation
allRestrict access to vulnerable endpoints to trusted networks only
# Use firewall rules to limit access
🧯 If You Can't Patch
- Implement strict input validation and sanitization on all endpoints
- Deploy web application firewall with DoS protection rules
🔍 How to Verify
Check if Vulnerable:
Check system version against SICK advisory and test endpoint response to malformed inputsCheck Version:
# Command varies by specific SICK product - check product documentationVerify Fix Applied:
Verify updated version and test endpoint with previously problematic inputs📡 Detection & Monitoring
Log Indicators:
- Unusually high request rates to specific endpoints
- System resource exhaustion warnings
- Repeated malformed input patterns
Network Indicators:
- Spike in traffic to vulnerable endpoints
- Abnormal request patterns
SIEM Query:
source="*" ("resource exhaustion" OR "high request rate" OR "malformed input") AND dest_port="[vulnerable_port]"🔗 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-2026-0001.json
- https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0001.pdf
- https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
