CVE-2026-37459

FAUCET Score

An integer underflow in FRRouting (FRR) stable/10.0 to stable/10.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.

First published: May 4, 2026Last modified: May 4, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
N/A	N/A	n/aCNA affected

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

3.9

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.37%

Probability of exploitation in next 30 days

EPSS Percentile

29.8%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0037 is in the 10th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

microsoft2026-May/CVE-2026-37459Moderate

An integer underflow in FRRouting (FRR) stable/10.0 to stable/10.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.

May 7, 2026

References

access.redhat.com / errata/RHSA-2026:24347

access.redhat.com / errata/RHSA-2026:24370

access.redhat.com / security/cve/CVE-2026-37459

bugzilla.redhat.com / show_bug.cgi

security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-37459.json

github.com / FRRouting/frr/commit/693a2e02687cdc9d16501275e05136edea9650d9