CVE record · CVE-2021-0207

NFX250, NFX350, QFX5K Series, EX2300 Series, EX3400 Series, EX4300 Multigigabit, EX4600 Series: Certain genuine traffic received by the Junos OS device will be discarded instead of forwarded.

CVSS 7.5 HighEPSS 0.013 · 70th percentile

Published by the CVE Program (CNA: juniper) at 15 Jan 2021, 17:35 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Juniper Networks	Junos OS	affected 17.3 to before 17.3R3-S7 custom affected 17.4 to before 17.4R2-S11, 17.4R3-S3 custom
Juniper Networks	Junos OS	affected 18.1 to before 18.1R3-S9 custom
Juniper Networks	Junos OS	affected 18.2 to before 18.2R3-S3 custom
Juniper Networks	Junos OS	affected 18.3 to before 18.3R3-S1 custom affected 18.4 to before 18.4R1-S5, 18.4R2-S3, 18.4R3 custom affected 19.1 to before 19.1R1-S5, 19.1R2-S1, 19.1R3 custom affected 19.2 to before 19.2R1-S5, 19.2R2 custom affected 19.3 to before 19.3R2-S3, 19.3R3 custom
Juniper Networks	Junos OS	affected 19.4 to before 19.4R1-S2, 19.4R2 custom

Identifiers: CVE-2021-0207
CNA: juniper
Weakness (CWE): CWE-115 · CWE-436
Tags: Juniper Networks Junos OS
CWE-115
CWE-436
Published: 15 Jan 2021
Updated: 17 Sept 2024

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (juniper)

CISA KEV Not listed.
EPSS 0.013, the 70th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 15 Jan 2021. New records show when each source confirmed them.

Sources

References from the CNA

kb.juniper.net/JSA11097 confirm

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.