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NVD / CVE Program· CNA mitre

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 caus

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: frr (Debian:12) 8.4.4-1.1~deb12u2; frr (Debian:13) 10.3-3+deb13u1; frr (Debian:14) 10.6.0-2.

Low priority for now. Upgrade to frr (Debian:12) 8.4.4-1.1~deb12u2; frr (Debian:13) 10.3-3+deb13u1; frr (Debian:14) 10.6.0-2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
May 4, 2026
Updated
Jun 17, 2026
EPSS
0.2% · 16th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-37458

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
frroutingfrrouting

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • frrouting frrouting10.0 and later · up to 10.6.0 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12frrbefore 8.4.4-1.1~deb12u28.4.4-1.1~deb12u2
Debian:13frrbefore 10.3-3+deb13u110.3-3+deb13u1
Debian:14frrbefore 10.6.0-210.6.0-2
openSUSE:Tumbleweedfrrbefore 10.6.1-1.110.6.1-1.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSfrrbefore 7.4-150300.4.43.17.4-150300.4.43.1
SUSE:Linux Enterprise Module for Server Applications 15 SP7frrbefore 8.5.7-150500.4.43.18.5.7-150500.4.43.1
SUSE:Linux Enterprise Module for Server Applications 15 SP7frrbefore 10.2.6-150700.3.10.110.2.6-150700.3.10.1
SUSE:Linux Enterprise Server 12 SP5-LTSSfrrbefore 8.5.7-8.16.18.5.7-8.16.1
SUSE:Linux Enterprise Server 16.0frrbefore 10.2.6-160000.1.110.2.6-160000.1.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5quaggabefore 1.1.1-17.16.11.1.1-17.16.1

Same product

frrouting: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-38406bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."
    39Monitor
  • CVE-2023-41361An issue was discovered in FRRouting FRR 9.0.
    39Monitor
  • CVE-2022-37032An out-of-bounds read in the BGP daemon of FRRouting FRR before 8.4 may lead to a segmentation fault and denial of service.
    37Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-28532Apr 30, 2026 · FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions
    24Monitor
  • ← EarlierCVE-2026-37457May 1, 2026 · An off-by-one out-of-bounds write vulnerability in the bgp_flowspec_op_decode() function (bgpd/bgp_flowspec_util.c) of FRRouting (FRR) stabl
    30Monitor
  • Later →CVE-2022-42917Sep 13, 2026 · In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:frr8.4.4-1.1~deb12u2 · Debian:12Package registry (OSV)
opensuse:frr10.6.1-1.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:frr10.2.6-160000.1.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:quagga1.1.1-17.16.1 · SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records