cisco-sa-sisf-dos-ZGwt4DdY: Multiple Cisco Products Switch Integrated Security Features DHCPv6 Denial of Service Vulnerability

First published: Wed May 07 2025(Updated: )

A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.This vulnerability is due to the incorrect handling of DHCPv6 packets. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sisf-dos-ZGwt4DdYThis advisory is part of the May 2025 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: May 2025 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication.

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• collector/cisco-recent
• source/Cisco
• agent/severity
• agent/title
• agent/references
• agent/source
• agent/last-modified-date
• agent/description
• agent/first-publish-date
• agent/type
• agent/event
• agent/softwarecombine
• agent/tags
• agent/guess-ai
• agent/software-canonical-lookup
• vendor/cisco
• canonical/cisco ios
• canonical/cisco ios xe
• canonical/cisco nx-os