Is CVE-2024-21612 actively exploited?

No active exploitation of CVE-2024-21612 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-21612 be exploited remotely?

Yes. CVE-2024-21612 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2024-21612?

CVE-2024-21612 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2024-21612

CWE-228Published: January 12, 2024· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).

On all Junos OS Evolved platforms, when specific TCP packets are received on an open OFP port, the OFP crashes leading to a restart of Routine Engine (RE). Continuous receipt of these specific TCP packets will lead to a sustained Denial of Service (DoS) condition.

This issue affects:

Juniper Networks Junos OS Evolved

* All versions earlier than 21.2R3-S7-EVO;

* 21.3 versions earlier than 21.3R3-S5-EVO ;

* 21.4 versions earlier than 21.4R3-S5-EVO;

* 22.1 versions earlier than 22.1R3-S4-EVO;

* 22.2 versions earlier than 22.2R3-S3-EVO ;

* 22.3 versions earlier than 22.3R3-EVO;

* 22.4 versions earlier than 22.4R2-EVO, 22.4R3-EVO.

NVD Source

Technical Analysis

CVE-2024-21612 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.