Executive Risk Summary
"A vulnerability in the packet inspection functionality of the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense Software could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to incorrect processing of traffic that is inspected by an affected device, which could allow an attacker to cause the affected device to enter an infinite loop while inspecting traffic."
Operational Audit Arsenal
Target Type Firmware Image
Target Asset Snort 3 Detection Engine
Standard Path Global Firmware
Manual Verification Required
This is a non-Windows asset (Cisco). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.
Patch Impact Forecast
Reboot Required Likely
High
Internal Work Notes
CVE-2025-20217: Unauthenticated remote attacker may cause DoS on Cisco Secure Firewall Threat Defense due to incorrect packet inspection processing. Verify version and apply patch as recommended by Cisco.
Technical Intelligence & Operational Utilities • Delivered Weekly
Intelligence Sources
Related Cisco Threats
Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.