CVE-2020-16162

Name: CVE-2020-16162
Creator: NVD / NIST
Published: 2020-07-30T16:15:11.85+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.74%

Last modified Jun 17, 2026

CVE-2020-16162 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in RIPE NCC RPKI Validator 3.x through 3.1-2020.07.06.14.28. Missing validation checks on CRL presence or CRL staleness in the X509-based RPKI certificate-tree validation procedure allow remote attackers to bypass intended access restrictions by using revoked certificates. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

An issue was discovered in RIPE NCC RPKI Validator 3.x through 3.1-2020.07.06.14.28. Missing validation checks on CRL presence or CRL staleness in the X509-based RPKI certificate-tree validation procedure allow remote attackers to bypass intended access restrictions by using revoked certificates. NOTE: there may be counterarguments related to backwards compatibility

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.74%

50.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-295

Affected Software

Vendor	Product	Versions
Ripe	Rpki Validator 3	>= 3.0, <= 3.1-2020.07.06.14.28

References

https://github.com/RIPE-NCC/rpki-validator-3/issues/162Third Party Advisory
https://github.com/RIPE-NCC/rpki-validator-3/issues/232Third Party Advisory
https://github.com/RIPE-NCC/rpki-validator-3/issues/162Third Party Advisory
https://github.com/RIPE-NCC/rpki-validator-3/issues/232Third Party Advisory

Timeline

Published: Jul 30, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-16162?

How severe is CVE-2020-16162?

CVE-2020-16162 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.

How do I fix CVE-2020-16162?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-16162?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST