CVE-2021-0233

moderate-risk

Published 2021-04-22

A vulnerability in Juniper Networks Junos OS ACX500 Series, ACX4000 Series, may allow an attacker to cause a Denial of Service (DoS) by sending a high rate of specific packets to the device, resulting in a Forwarding Engine Board (FFEB) crash. Continued receipt of these packets will sustain the Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS on ACX500 Series, ACX4000 Series: 17.4 versions prior to 17.4R3-S2.

Do I need to act?

0.54% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (20)

Junos

Affected Vendors

Juniper

References (2)

Vendor Advisory https://kb.juniper.net/JSA11128

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moderate-risk

Severity 26/34 · High

Exploitability 2/34 · Minimal

Exposure 21/34 · High