Medium severity · published May 4, 2026
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…
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Frrouting · Frrouting
10.0 through 10.6.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-37458
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-37458
Patch
https://github.com/FRRouting/frr/commit/8102a8aeceb9f86fdfe1f80cd77080522bab69c8
Third Party Advisory
https://github.com/mertsatilmaz/vulnerability-research/blob/main/advisories/CVE-2026-36365.md
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