01 Record
CVE-2021-0226
Junos OS Evolved: The IPv6 BGP session will flap due to receipt of a specific IPv6 packet
HighPUBLISHEDCNA: juniper
CNA base score7.1 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
02 Description
Junos OS Evolved: The IPv6 BGP session will flap due to receipt of a specific IPv6 packet
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
- 0.87% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 58.6% 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 19:36Z5 YR AGO
- Last updated
- 2024-09-17 00:11Z2 YR AGO
- Reserved
- 2020-10-27
- Assigning CNA
- juniper
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.1)
- CNA CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- Weaknesses
- CWE-665Improper InitializationClass
- Data version
- 5.1
- Document digest
- e59a8b136d1866da73d623bd57d0feef1944e12dcd8aec96ed12211508bd4485
05 Affected products
VendorProductVersionsPlatforms
Juniper NetworksJunos OS Evolved19.4-EVO to < 19.4R2-S3-EVO, 20.1-EVO to < 20.1R2-S3-EVO, 20.2-EVO to < 20.2R2-S1-EVO, 20.3-EVO to < 20.3R2-EVO—
06 References
- kb.juniper.nethttps://kb.juniper.net/JSA11121
07 Remediation
The following software releases have been updated to resolve this specific issue: Junos OS Evolved: 19.4R2-S3-EVO, 20.1R2-S3-EVO, 20.2R2-S1-EVO, 20.3R2-EVO, 20.4R1-EVO, and all subsequent releases.