How severe is CVE-2026-37458?

CVE-2026-37458 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-37458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-37458?

CVE-2026-37458 affects Frrouting. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-37458?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-37458 have an EU (EUVD) identifier?

Yes. CVE-2026-37458 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26977.

When was CVE-2026-37458 published?

CVE-2026-37458 was published on 2026-05-04 and last updated on 2026-06-17.

CVE-2026-37458

CVE-2026-37458 is a medium-severity vulnerability in Frrouting with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26977
Weakness: CWE-20
Affected product: Frrouting
Published: 2026-05-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-37458?: CVE-2026-37458 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-37458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-37458?: CVE-2026-37458 affects Frrouting. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-37458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-37458 have an EU (EUVD) identifier?: Yes. CVE-2026-37458 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26977.
When was CVE-2026-37458 published?: CVE-2026-37458 was published on 2026-05-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:frrouting:frrouting:*:*:*:*:*:*:*:*

More vulnerabilities in Frrouting

CVE-2023-38406 — Critical (CVSS 9.8): bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."
CVE-2023-41361 — Critical (CVSS 9.8): An issue was discovered in FRRouting FRR 9.0. bgpd/bgp_open.c does not check for an overly large length of the rcv…
CVE-2023-41360 — Critical (CVSS 9.1): An issue was discovered in FRRouting FRR through 9.0. bgpd/bgp_packet.c can read the initial byte of the ORF header in…
CVE-2023-41359 — Critical (CVSS 9.1): An issue was discovered in FRRouting FRR through 9.0. There is an out-of-bounds read in bgp_attr_aigp_valid in…
CVE-2022-37032 — Critical (CVSS 9.1): An out-of-bounds read in the BGP daemon of FRRouting FRR before 8.4 may lead to a segmentation fault and denial of…
CVE-2022-37035 — High (CVSS 8.1): An issue was discovered in bgpd in FRRouting (FRR) 8.3. In bgp_notify_send_with_data() and bgp_process_packet() in…

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