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Cisco IOS XE Software

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high advisory

Cisco IOS XE DHCP Snooping BOOTP VLAN Leakage DoS (CVE-2026-20084)

CVE-2026-20084 describes a vulnerability in Cisco IOS XE DHCP snooping where an unauthenticated remote attacker can cause a denial-of-service by forwarding BOOTP packets between VLANs, leading to high CPU utilization on affected Cisco Catalyst 9000 Series Switches.

Cisco IOS XE Software +1 cve-2026-20084 dhcp-snooping bootp denial-of-service cisco
2r 1t
high advisory

Cisco IOS XE Software TLS Memory Exhaustion Vulnerability (CVE-2026-20004)

CVE-2026-20004 is a vulnerability in the TLS library of Cisco IOS XE Software that allows an unauthenticated, adjacent attacker to exhaust device memory, leading to denial of service.

Cisco IOS XE Software cisco ios xe tls denial of service memory exhaustion
2r 1t
high advisory

Cisco IKEv2 Memory Leak Vulnerability (CVE-2026-20012)

CVE-2026-20012 is a vulnerability in the IKEv2 feature of multiple Cisco products that allows an unauthenticated remote attacker to cause a denial of service by sending crafted IKEv2 packets leading to memory exhaustion.

Cisco IOS Software +3 cve-2026-20012 denial-of-service cisco ikev2
2r 2t