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01 Record

CVE-2021-0233

Junos OS: ACX500 Series, ACX4000 Series: Denial of Service due to FFEB crash while processing high rate of specific packets.

HighPUBLISHEDCNA: juniper
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

02 Description

Junos OS: ACX500 Series, ACX4000 Series: Denial of Service due to FFEB crash while processing high rate of specific packets.

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.96% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 61.1% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-04-22 19:37Z5 YR AGO
Last updated
2024-09-16 18:14Z2 YR AGO
Reserved
2020-10-27
Assigning CNA
juniper
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-400Uncontrolled Resource ConsumptionClass
  • CWE-794Incomplete Filtering of Multiple Instances of Special ElementsVariant
Data version
5.1
Document digest
565aea23e67f52e1ad4bbe653906dd5d3be6b12c4334e272192f6fe882bec3d9

05 Affected products

VendorProductVersionsPlatforms
Juniper NetworksJunos OS17.4 to < 17.4R3-S2ACX500 Series, ACX4000 Series

06 References

07 Remediation

The following software releases have been updated to resolve this specific issue: 17.4R3-S2, and all subsequent releases.