What is CVE-2026-37458?

CVE-2026-37458 is a medium-severity vulnerability in Frrouting, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-05-04.

How severe is CVE-2026-37458?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Frrouting

CVE-2026-37458

Missing input validation in the MP_REACH_NLRI component of FRRouting (FRR) stable/10.0 to stable/10.6 allows authenticated attackers to cause a Denial of Service (DoS) via supplying a crafted UPDATE message.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.000 (15.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Frrouting
N/a — versions n/a

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

cve@mitre.org (Patch)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2026-37458?: CVE-2026-37458 is a medium-severity vulnerability in Frrouting, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-05-04.
How severe is CVE-2026-37458?: Medium severity. CVSS v3 base score is 6.5 out of 10.