CVE-2021-0233
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS probability
- 0.54%
- CWE
- CWE-794, CWE-400
- Published
- 2021-04-22
- Last modified
- 2026-03-13
Affected products
- Juniper Networks Junos OS
Weakness type
Related vulnerabilities
- CVE-2026-21876 — OWASP CRS has multipart bypass using multiple content-type parts
- CVE-2021-0203 — Junos OS: EX and QFX5K Series: Storm Control does not work as expected when Redundant Trunk Group is configured
- CVE-2020-1665 — Junos OS: MX series/EX9200 Series: IPv6 DDoS protection does not work as expected.
- CVE-2019-0002 — Junos OS: EX2300 and EX3400 series: Certain stateless firewall filter rules might not take effect