CVE-2025-20191 | Cisco IOS - Switch Integrated Security Features Operational Intel

Executive Risk Summary

"A vulnerability in the Switch Integrated Security Features of Cisco IOS Software could allow an unauthenticated, adjacent attacker to cause a denial of service condition on an affected device. This vulnerability is due to the incorrect handling of DHCPv6 packets, which could allow an attacker to cause the device to reload, resulting in a DoS condition."

Operational Audit Arsenal

Target Type Firmware Image

Target Asset Cisco IOS Image

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

Network disruption possible during reboot

Internal Work Notes

CVE-2025-20191: Potential DoS vulnerability in Cisco IOS due to incorrect handling of DHCPv6 packets, requiring firmware update and reboot

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Official Advisoryhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sisf-dos-ZGwt4DdY

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Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.