Medium

CVE-2026-5107 — FRRouting FRR EVPN Type-2 Route bgp_evpn.c process_type2_route access control

A vulnerability has been found in FRRouting FRR up to 10.5.1. This affects the function process_type2_route of the file bgpd/bgp_evpn.c of the component EVPN Type-2 Route Handler. The manipulation leads to improper access controls. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitability is reported as difficult. The identifier of the patch is 7676cad65114aa23adde583d91d9d29e2debd045. To fix this issue, it is recommended to deploy a patch.

Published Mar 30, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.4% (30-day exploitation probability)+4
Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.37%

ahead of 29% of scored CVEs · Oct 15, 2026

Affects

FRRouting

FRR and 1 more

CVSS base

4.2

Medium · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — github.com (NIST National Vulnerability Database)
Documented patch — github.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (FRRouting FRR, Frrouting Frrouting).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
FRRouting	FRR	version 10.5.0version 10.5.1	Vulnerable	CVE Program (cve.org) e CISA ADP
Frrouting	Frrouting	version 10.5.0version 10.5.1	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
2.3	CVSS 4.0	Low	—	—	cna@vuldb.com via NIST National Vulnerability Database
2.3	CVSS 4.0	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP
4.2	CVSS 3.1	Medium	1.6	2.5	cna@vuldb.com via NIST National Vulnerability Database
4.2	CVSS 3.1	Medium	1.6	2.5	nvd@nist.gov via NIST National Vulnerability Database
4.2	CVSS 3.1	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
4.2	CVSS 3.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
3.6	CVSS 2.0	Low	3.9	4.9	cna@vuldb.com via NIST National Vulnerability Database
3.6	CVSS 2.0	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-266

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.37%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · frrouting/frr
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
Fix documented
Oct 13, 2026 · NIST National Vulnerability Database
CVSS changed · 4.2
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
Mar 30, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

6 on the record

github.com/FRRouting/frr/commit/7676cad65114aa23adde583d91d9d29e2debd045
Patch, patch, NIST National Vulnerability Database
github.com/FRRouting/frr/pull/21098
Issue Tracking, Patch, issue-tracking, patch, NIST National Vulnerability Database
github.com/FRRouting/frr/
Product, product, NIST National Vulnerability Database
vuldb.com/vuln/354132/cti
Permissions Required, VDB Entry, signature, permissions-required, NIST National Vulnerability Database
vuldb.com/vuln/354132
Third Party Advisory, VDB Entry, vdb-entry, technical-description, NIST National Vulnerability Database
vuldb.com/submit/780123
Third Party Advisory, VDB Entry, third-party-advisory, NIST National Vulnerability Database

Elsewhere on this site

FRRouting
every CVE for this vendor

CWE-266
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2022-42917 TOCTOU Race Condition in Frrouting Sep 13, 2026
Medium CVE-2026-37458 Improper Input Validation in Frrouting May 4, 2026
High CVE-2026-37457 Out-of-bounds Write in Frrouting May 1, 2026
Medium CVE-2026-28532 FRRouting < 10.5.3 Integer Overflow in OSPF TLV Parser Functions Apr 30, 2026
High CVE-2025-61104 NULL Pointer Dereference in Frrouting Oct 28, 2025
High CVE-2025-61106 NULL Pointer Dereference in Frrouting Oct 28, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-5107 is "FRRouting FRR EVPN Type-2 Route bgp_evpn.c process_type2_route access control", rated Medium. It affects FRR (FRRouting); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 4.2 describes technical severity. EPSS 0.37% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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