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01 Record

CVE-2021-31353

Junos OS and Junos OS Evolved: RPD core upon receipt of specific BGP update

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 and Junos OS Evolved: RPD core upon receipt of specific BGP update

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
1.16% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 67.2% 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
2021-10-19 18:16Z5 YR AGO
Last updated
2024-09-16 17:37Z2 YR AGO
Reserved
2021-04-15
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-755Improper Handling of Exceptional ConditionsClass
Data version
5.1
Document digest
2b6b89b45e984c465f81a09bb123fc5178082da57b3097aae9bdd516c24ffc7b

05 Affected products

VendorProductVersionsPlatforms
Juniper NetworksJunos OS19.3R3-S2, 19.4R3-S3, 21.1 to < 21.1R2—
Juniper NetworksJunos OS Evolved< 20.4R2-S3-EVO, 20.4R3-EVO, 21.1-EVO to < 21.1R2-EVO, 21.2-EVO to < 21.2R2-EVO—

06 References

07 Remediation

The following software releases have been updated to resolve this specific issue: Junos OS 18.4R2-S9, 19.1R3-S7, 19.3R3-S3, 19.4R1-S4, 19.4R3-S4, 20.1R3, 20.2R3-S2, 20.3R3, 20.4R3, 21.1R2, 21.2R1, 21.2R2, 21.3R1, and all subsequent releases. Junos OS Evolved 20.4R2-S3-EVO, 20.4R3-EVO, 21.1R2-EVO, 21.2R2-EVO, 21.3R1-EVO, and all subsequent releases. Note: Only those releases listed in the PROBLEM section above are affected. This fix has also been proactively committed into other releases that are not vulnerable to this issue.