CVE-2026-37457: Frrouting

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

An off-by-one out-of-bounds write vulnerability in the bgp_flowspec_op_decode() function (bgpd/bgp_flowspec_util.c) of FRRouting (FRR) stable/10.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted FlowSpec component.

Affected products

• Frrouting Frrouting: version 10.0 only

Published 2026-05-01. Last modified 2026-07-15.