High severity · published Oct 26, 2026
CVE-2026-72758
Routinator may exit on malformed ranges
New
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
When parsing an AS range in Routinator, if the maximum value of the range is smaller than the minimum value of the range, Routinator will never reach the maximum value and run out of memory.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RO
Routinator · NLnet Labs
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72758
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72758
www.nlnetlabs.nl
https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt
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7.5
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