6.5

CVE-2026-37458: frrouting Improper Input Validation

CVSS: 6.5v3.1MediumAnalyzed
AliasesSUSE-SU-2026:3868-1UBUNTU-CVE-2026-37458DEBIAN-CVE-2026-37458
Published 04-05-2026Last modified 05-05-2026
Open JSON

Vulnerability summary

CVE-2026-37458 is a medium (CVSS 6.5) Improper Input Validation vulnerability in frrouting. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 36.9% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.44%
0%100%
Low · +0.19 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 7
OPENSUSE-SU-2026:10721-1SUSE-SU-2026:22026-1SUSE-SU-2026:2454-1SUSE-SU-2026:2455-1SUSE-SU-2026:2457-1SUSE-SU-2026:2644-1

Timeline

  1. 04-05-2026
    PublishedVulnerability first disclosed.
  2. 05-05-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

+0.19 pp

From 0.25% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.44%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu2 products
  • frrAll versions (No fix recorded) | < 8.1-1ubuntu1.16 | < 8.4.4-1.1ubuntu6.7 | < 10.4.1-3ubuntu1.4 | < 10.5.1-1ubuntu4.1
  • quaggaAll versions (No fix recorded)
Debian1 product
  • frr< 8.4.4-1.1~deb12u2 | < 10.3-3+deb13u1 | < 10.6.0-2
Frrouting1 product
Suse1 product
  • quagga&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5< 1.1.1-17.16.1

4 vendors · 5 products

References

10 links