What is CVE-2026-37457?

CVE-2026-37457 is a high-severity vulnerability in Frrouting, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-05-01.

How severe is CVE-2026-37457?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Frrouting

CVE-2026-37457

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 compone…

Vulnerability class: Buffer Overflow

EPSS: 0.001 (18.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Frrouting — versions 10.0
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (Patch)

Frequently asked questions

What is CVE-2026-37457?: CVE-2026-37457 is a high-severity vulnerability in Frrouting, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-05-01.
How severe is CVE-2026-37457?: High severity. CVSS v3 base score is 7.5 out of 10.