CVE-2026-37458

MEDIUMNVD 6.56.5—

6.5

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 v3: 6.5
EG Score: 6.5(high)
EPSS: 15.4%
KEV: Not listed

Published

May 4, 2026

Last Modified

May 11, 2026

Advisory Details (2)

Auto-updated May 5, 2026

No patch confirmed yet.

generic

vulnerability-research/advisories/CVE-2026-36365.md at main · mertsatilmaz/vulnerability-research · GitHub

https://github.com/mertsatilmaz/vulnerability-research/blob/main/advisories/CVE-2026-36365.md

generic

bgpd: Validate MP_REACH_NLRI attribute against incorrect next-hop · FRRouting/frr@8102a8a · GitHub

https://github.com/FRRouting/frr/commit/8102a8aeceb9f86fdfe1f80cd77080522bab69c8

Vendor Advisories for CVE-2026-37458(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-37458
Microsoft Security Response Center (MSRC)
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.

Frequently asked(5)

What is CVE-2026-37458?

CVE-2026-37458 is a medium vulnerability published on May 4, 2026. Missing input validation in the MPREACHNLRI 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.

When was CVE-2026-37458 disclosed?

CVE-2026-37458 was first published in the National Vulnerability Database on May 4, 2026, with the most recent update on May 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-37458 actively exploited?

CVE-2026-37458 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-37458?

CVE-2026-37458 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2026-37458?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-37458, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-37458

📅 Published

🔄 Last Modified

📋 Advisory Details (2)