CVE-2026-37459 — HIGH (7.5)

Vulnerability Description

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.

CVSS Score

7.5

HIGH

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

NONE

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-400

References

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

FAQ

What is CVE-2026-37459?

CVE-2026-37459 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.

How severe is CVE-2026-37459?

CVE-2026-37459 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-37459?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.