01 Record

CVE-2021-0278

Junos OS: J-Web allows a locally authenticated attacker to escalate their privileges to root.

HighPUBLISHEDCNA: juniper

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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02 Description

Junos OS: J-Web allows a locally authenticated attacker to escalate their privileges to root.

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: 0.92% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 60.1% of scored records. A rank, not a probability.
NVD base score: 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

2021-07-15 20:00Z5 YR AGO

Last updated

2024-09-17 03:37Z2 YR AGO

Reserved

2020-10-27

Assigning CNA

juniper

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

5d2a6c64a5290b63296e346421fd9abbcc2a0a4dc2879940aa701132f973f1c8

05 Affected products

VendorProductVersionsPlatforms

Juniper NetworksJunos OS19.3R1 to < 19.3*, 19.4 to < 19.4R3-S5, 20.1 to < 20.1R2-S2, 20.1R3-S1, 20.2 to < 20.2R3-S2, 20.3 to < 20.3R3, 20.4 to < 20.4R2-S1, 20.4R3, 21.1 to < 21.1R1-S1, 21.1R2—

06 References

kb.juniper.nethttps://kb.juniper.net/JSA11182x_refsource_CONFIRM

07 Remediation

The following software releases have been updated to resolve this specific issue: 19.3R2-S6, 19.3R3-S3, 19.4R3-S5, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2, 20.3R3, 20.4R2-S1, 20.4R3, 21.1R1-S1, 21.1R2, 21.2R1, and all subsequent releases. In addition to the above fixed releases, for the following not-affected releases additional security enhancements were included in Junos OS 18.3R3-S5, 18.4R3-S9, 19.1R3-S6 as a result of resolving this issue.