High severity · published Oct 26, 2026
CVE-2026-72753
Routinator incorrectly handles delta updates
New
8.2
CVSS
0.4%
EPSS
No
On KEV
Description
When Routinator encounters an RRDP notification file with gaps in the delta entries, it is still accepted and parsed, potentially leading to missing data. If it encounters too many delta entries it may run out of memory.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
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-2026-72753
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-72753
www.nlnetlabs.nl
https://www.nlnetlabs.nl/downloads/routinator/CVE-2026-72753.txt
More from Routinator
8.7
CVE-2026-49232
Routinator exits when accepting an incoming HTTP or RTR connection fails
7.5
CVE-2026-72758
Routinator may exit on malformed ranges
7.5
CVE-2026-72756
Routinator exits on malformed rsync URIs
7.5
CVE-2026-72754
Routinator exits when parsing an incorrect or very large CRL file
7.5
CVE-2026-49235
Routinator crashes on specifically crafted RRDP XML files