CVE-2026-73460 Security Advisory 0160

On affected platforms running Arista EOS with IS-IS graceful restart enabled, an unauthenticated attacker who can inject a malformed IS-IS LSP PDU packet can cause the IS-IS graceful restart procedure to terminate prematurely. This may result in traffic loss following a restart event...

CVE-2026-73460 Security Advisory 0160

On affected platforms running Arista EOS with IS-IS graceful restart enabled, an unauthenticated attacker who can inject a malformed IS-IS LSP PDU packet can cause the IS-IS graceful restart procedure to terminate prematurely. This may result in traffic loss following a restart event...

CVE-2026-73460

CVE-2026-73460 affects Arista EOS running with IS-IS graceful restart enabled. An unauthenticated attacker in the same Layer 2 domain can inject a malformed IS-IS LSP PDU, causing the graceful restart procedure to terminate prematurely and resulting in traffic loss after a restart event. The unde...

CVE-2026-73459 Security Advisory 0160

On affected platforms running Arista EOS with IS-IS configured, an unauthenticated attacker who can inject a specially crafted IS-IS LSP PDU can cause the legitimate LSP to be unexpectedly purged from the IS-IS link-state database. This may result in traffic loss...

CVE-2026-73459 Security Advisory 0160

On affected platforms running Arista EOS with IS-IS configured, an unauthenticated attacker who can inject a specially crafted IS-IS LSP PDU can cause the legitimate LSP to be unexpectedly purged from the IS-IS link-state database. This may result in traffic loss...

CVE-2026-73459

CVE-2026-73459 affects Arista EOS with IS-IS configured (versions 4.36.1F and below in the 4.36.x train). An unauthenticated attacker in the same Layer 2 domain can inject a specially crafted IS-IS LSP PDU, causing the legitimate LSP to be purged from the link-state database due to a checksum val...

CVE-2026-73446

CVE-2026-73446 affects Arista EOS on multiple hardware platforms (710, 720D, 720XP, 750X, 7010TX, 7020R, 7130, 7170, 7050X, 7060X, 7260X, 7280R, 7300X, 7320X, 7358X4, 7368X4, 7388X5, 7500R, 7800R, 7700R, AWE, CloudEOS, cEOS/vEOS-lab, CloudVision eXchange). When IS-IS is configured on a broadcast ...

CVE-2026-73446 Security Advisory 0160

On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Data Unit PDU that causes the device to tear down an established IS-IS adjacency. This may result in traffic disruption and loss of IP...

CVE-2026-73446 Security Advisory 0160

On affected platforms running Arista EOS with IS-IS configured on a broadcast interface, an unauthenticated attacker can send a crafted IS-IS Hello Protocol Data Unit PDU that causes the device to tear down an established IS-IS adjacency. This may result in traffic disruption and loss of IP...

CVE-2026-73444

On affected platforms running Arista EOS with VRRPv2 IP Authentication Header IP-AH authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the virtual router master role, enabling the...

CVE-2026-73437

On affected platforms running Arista EOS with Dynamic Host Configuration Protocol DHCP relay configured, an unauthenticated attacker with network access could send a crafted DHCP reply packet from an IP address that is not configured as a helper address, and the relay agent would forward it to...

CVE-2026-19655

On affected platforms running Arista EOS with Dynamic Host Configuration Protocol DHCP relay/snooping configured with the information option Option 82, or with the DHCP server configured with match criteria based on the information option, an unauthenticated attacker connected to a client-facing...

CVE-2026-73444 On affected platforms running Arista EOS with VRRPv2 IP Authentication Header (IP-AH) authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the

On affected platforms running Arista EOS with VRRPv2 IP Authentication Header IP-AH authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the virtual router master role, enabling the...

CVE-2026-73444

CVE-2026-73444 affects Arista EOS switches where VRRPv2 is configured with IP-AH authentication enabled. An unauthenticated attacker with access to the layer 2 network segment can bypass VRRP authentication and claim the virtual router master role, enabling them to intercept, modify, or discard t...

CVE-2026-73444 On affected platforms running Arista EOS with VRRPv2 IP Authentication Header (IP-AH) authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the

On affected platforms running Arista EOS with VRRPv2 IP Authentication Header IP-AH authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the virtual router master role, enabling the...

CVE-2026-73437 On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) relay configured, an unauthenticated attacker with network access could send a crafted DHCP reply packet from an IP address that is not configured as a helper/destinat

On affected platforms running Arista EOS with Dynamic Host Configuration Protocol DHCP relay configured, an unauthenticated attacker with network access could send a crafted DHCP reply packet from an IP address that is not configured as a helper address, and the relay agent would forward it to...

CVE-2026-73437

Arista EOS DHCP relay is vulnerable to spoofed DHCP reply forwarding (CWE-345). An unauthenticated attacker on an adjacent network can send crafted DHCP reply packets from a non-helper IP address, which the relay forwards to clients without source validation, potentially supplying malicious netwo...

CVE-2026-73437 On affected platforms running Arista EOS with Dynamic Host Configuration Protocol (DHCP) relay configured, an unauthenticated attacker with network access could send a crafted DHCP reply packet from an IP address that is not configured as a helper/destinat

On affected platforms running Arista EOS with Dynamic Host Configuration Protocol DHCP relay configured, an unauthenticated attacker with network access could send a crafted DHCP reply packet from an IP address that is not configured as a helper address, and the relay agent would forward it to...

CVE-2026-19655

CVE-2026-19655 affects Arista EOS when DHCP relay/snooping is configured with Option 82 (information option) or when the DHCP server uses match criteria based on that option. An unauthenticated attacker on a client-facing VLAN can send a specially crafted packet that triggers a DHCP Relay service...

EUVD-2026-80003

On affected platforms running Arista EOS with Dynamic Host Configuration Protocol DHCP relay/snooping configured with the information option Option 82, or with the DHCP server configured with match criteria based on the information option, an unauthenticated attacker connected to a client-facing...