CVE-2021-3396

Name: CVE-2021-3396
Creator: NVD / NIST
Published: 2021-02-17T21:15:13.12+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.37%

Last modified Jun 17, 2026

CVE-2021-3396 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. OpenNMS Meridian 2016, 2017, 2018 before 2018.1.25, 2019 before 2019.1.16, and 2020 before 2020.1.5, Horizon 1.2 through 27.0.4, and Newts <1.5.3 has Incorrect Access Control, which allows local and remote code execution using JEXL expressions.. EPSS estimates a 2.37% chance of exploitation in the next 30 days.

Description

OpenNMS Meridian 2016, 2017, 2018 before 2018.1.25, 2019 before 2019.1.16, and 2020 before 2020.1.5, Horizon 1.2 through 27.0.4, and Newts <1.5.3 has Incorrect Access Control, which allows local and remote code execution using JEXL expressions.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.37%

81.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Opennms	Horizon	>= 16.0.0, <= 27.0.3
Opennms	Meridian	>= 2016.1.0, <= 2016.1.24
Opennms	Meridian	>= 2017.1.0, <= 2017.1.26
Opennms	Meridian	>= 2018.1.0, < 2018.1.25
Opennms	Meridian	>= 2019.1.0, < 2019.1.16
Opennms	Meridian	>= 2020.1.0, < 2020.1.5
Opennms	Newts	< 1.5.3

References

https://www.opennms.comVendor Advisory
https://www.opennms.com/en/blog/2021-02-16-cve-2021-3396-full-security-disclosure/Vendor Advisory
https://www.opennms.comVendor Advisory
https://www.opennms.com/en/blog/2021-02-16-cve-2021-3396-full-security-disclosure/Vendor Advisory

Timeline

Published: Feb 17, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3396?

How severe is CVE-2021-3396?

CVE-2021-3396 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.37% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3396?

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-2021-3396?

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

Scan your code now

Source: NVD / NIST