CVE-2026-73455 Security Advisory 0173

On affected platforms running Arista EOS with Open Shortest Path First version 3 OSPFv3 configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly...

CVE-2026-73455

CVE-2026-73455 affects Arista EOS where a specially crafted network packet can cause the OSPFv3 agent to restart unexpectedly, resulting in high availability impact (CVSS 3.1: 7.5). The root cause is classified as CWE-130 (Improper Handling of Length Parameter Inconsistency). Exploitation require...

CVE-2026-73455 Security Advisory 0173

On affected platforms running Arista EOS with Open Shortest Path First version 3 OSPFv3 configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly...

CVE-2026-73435 Security Advisory 0171

On affected platforms running Arista EOS with Open Shortest Path First version 2 OSPFv2 configured, a specially crafted OSPFv2 packet from an unauthenticated attacker on the same broadcast segment, with OSPFv2 authentication configured can cause adjacency flapping and packet loss. The disruption...

CVE-2026-73435 Security Advisory 0171

On affected platforms running Arista EOS with Open Shortest Path First version 2 OSPFv2 configured, a specially crafted OSPFv2 packet from an unauthenticated attacker on the same broadcast segment, with OSPFv2 authentication configured can cause adjacency flapping and packet loss. The disruption...

CVE-2026-73436 Security Advisory 0171

On affected platforms running Arista EOS with OSPFv2 and OSPFv2 segment routing configured, a specially crafted OSPFv2 packet from an adjacent OSPF neighbor may cause OSPF to restart unexpectedly...

CVE-2026-73436 Security Advisory 0171

On affected platforms running Arista EOS with OSPFv2 and OSPFv2 segment routing configured, a specially crafted OSPFv2 packet from an adjacent OSPF neighbor may cause OSPF to restart unexpectedly...

CVE-2026-73436

CVE-2026-73436 affects Arista EOS when OSPFv2 segment routing is configured. A specially crafted OSPFv2 packet from an adjacent neighbor can trigger an unexpected OSPF process restart , causing a high availability impact (CVSS 3.1: 6.5 Medium; CVSS 4.0: 6.0 Medium). The root cause is linked to CW...

EUVD-2026-80329

On affected platforms running Arista EOS with OSPFv2 and OSPFv2 segment routing configured, a specially crafted OSPFv2 packet from an adjacent OSPF neighbor may cause OSPF to restart unexpectedly...

EUVD-2026-80007

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-2026-73435: Insufficient Verification of Data Authenticity

On affected platforms running Arista EOS with Open Shortest Path First version 2 OSPFv2 configured, a specially crafted OSPFv2 packet from an unauthenticated attacker on the same broadcast segment, with OSPFv2 authentication configured can cause adjacency flapping and packet loss. The disruption...

CVE-2026-73460: Incorrect Authorization

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-2026-73453: Improper Control of Generation of Code

An unauthenticated P4Runtime Programming Protocol-Independent Packet Processors Runtime client can achieve arbitrary code execution under certain conditions on affected platforms running Arista EOS configured with P4Runtime. P4Runtime is disabled by default in Arista EOS. By crafting a malicious...

CVE-2026-73436: Improper Validation of Specified Quantity in Input

On affected platforms running Arista EOS with OSPFv2 and OSPFv2 segment routing configured, a specially crafted OSPFv2 packet from an adjacent OSPF neighbor may cause OSPF to restart unexpectedly...

CVE-2026-82717: Heap-based Buffer Overflow

In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in that can progressively corrupt heap memory and under certain systems and compilation options could lead to remote code execution. The vulnerability starts when CNAME synthesis during an upstream response needs to...

CVE-2026-73455: Improper Handling of Length Parameter Inconsistency

On affected platforms running Arista EOS with Open Shortest Path First version 3 OSPFv3 configured, a specially crafted packet can cause the OSPFv3 agent to restart unexpectedly...

PT-2026-93408

Name of the Vulnerable Software and Affected Versions Arista EOS affected versions not specified Description An issue exists in the Open Shortest Path First version 2 OSPFv2 implementation. An unauthenticated attacker on the same broadcast segment can send a specially crafted OSPFv2 packet to a...

CVE-2026-76685

A vulnerability exists in the proxy packet processing logic of the affected component where it improperly processes malformed or truncated input. An unauthenticated remote attacker could exploit this vulnerability by providing specially crafted input that triggers an integer overflow. Successful...

CVE-2026-73458

On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection BFD sessions configured, a specially crafted packet can cause the BFD sessions to go down. This may result in undesirable network changes because various routing protocols monitor status on BFD sessions...

EUVD-2026-79238

On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection BFD sessions configured, a specially crafted packet can cause the BFD sessions to go down. This may result in undesirable network changes because various routing protocols monitor status on BFD sessions...