Is CVE-2023-39916 in the CISA KEV catalog?

No. CVE-2023-39916 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-39916?

CVE-2023-39916 has a CVSS v3 base score of 9.3 (CRITICAL).

What is the EPSS score for CVE-2023-39916?

CVE-2023-39916 has an EPSS score of 0.55% (42th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-39916?

Upgrade routinator to 0.12.2 or later.

CVE & CISA-KEV Catalog

CVE-2023-39916

CRITICAL

9.3

CVSS v3

NVD

Description

NLnet Labs’ Routinator 0.9.0 up to and including 0.12.1 as well as 0.14.0 up to and including 0.14.2 contains a possible path traversal vulnerability in the optional, off-by-default keep-rrdp-responses feature that allows users to store the content of responses received for RRDP requests. The location of these stored responses is constructed from the URL of the request. Due to insufficient sanitation of the URL, it is possible for an attacker to craft a URL that results in the response being stored outside of the directory specified for it.

CWE-35 CWE-22Path Traversal

How to fix

Remediation Available

routinatorNVD

Affected:>= 0.9.0, < 0.12.2Fixed in:0.12.2CVE-2023-39916derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.55%probability of exploitation in 30 days

42ndpercentile

Moderate risk: more likely to be exploited than 42% of all known CVEs.

References

Vendor Advisory1

nlnetlabs.nl

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-03.