Skip to content
VulniPulse
Sign in

Cisco Catalyst Vulnerabilities & Security Advisories

2 advisories tracked · Cisco Security Advisories · 0 listed in the CISA Known Exploited Vulnerabilities catalog

Every row below is a published Cisco advisory that VulniPulse classified as Catalyst, with the CVEs, affected and fixed releases and exploitation status the vendor stated. Severity mix: 1 high, 1 medium.

Android app · Google Play

Monitor Cisco CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.

Get CVE alertsSee app features

Source

Cisco Security Advisories

Polled via the official Cisco PSIRT RSS feed. Advisory pages are fetched for new items to extract fixed software and workarounds.

Visit Cisco advisories Cisco RSS feed Catalyst end-of-life dates(182 dated releases)

Latest Cisco Catalyst advisories

All severitiescritical (0)high (1)medium (1)low (0)
High8.6Cisco

High [CVE-2026-20084] Cisco IOS XE Software for Catalyst 9000 Series Switches DHCP Snooping Denial of Service Vulnerability

A vulnerability in the DHCP snooping feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause BOOTP packets to be forwarded between VLANs, resulting in a denial of service (DoS) condition. This vulnerability is due to improper handling of BOOTP packets on Cisco Catalyst 9000 Series Switches. An attacker could exploit this vulnerability by sending BOOTP request packets to an affected device. A successful exploit could allow an attacker to forward BOOTP packets from one VLAN to another, resulting in BOOTP VLAN leakage and potentially leading to high CPU utiliz… Affected products named by the advisory: Cisco IOS XE Software 16.6.1; Cisco IOS XE Software 16.6.2; Cisco IOS XE Software 16.6.3; Cisco IOS XE Software 16.6.5; and 3 more.

CVE-2026-20084
Catalyst 9000
Mar 25, 2026

← All Cisco advisories