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CVE-2022-22186

Junos OS: EX4650 Series: Certain traffic received by the Junos OS device on the management interface may be forwarded to egress interfaces instead of discarded

High7.2EPSS 0.64%
Published
Updated
Reserved
Assigned by
juniper

Description

Due to an Improper Initialization vulnerability in Juniper Networks Junos OS on EX4650 devices, packets received on the management interface (em0) but not destined to the device, may be improperly forwarded to an egress interface, instead of being discarded. Such traffic being sent by a client may appear genuine, but is non-standard in nature and should be considered as potentially malicious. This issue affects: Juniper Networks Junos OS on EX4650 Series: All versions prior to 19.1R3-S8; 19.2 versions prior to 19.2R3-S5; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R3-S7; 20.1 versions prior to 20.1R3-S3; 20.2 versions prior to 20.2R3-S4; 20.3 versions prior to 20.3R3-S3; 20.4 versions prior to 20.4R3-S2; 21.1 versions prior to 21.1R3-S1; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R2; 21.4 versions prior to 21.4R2; 22.1 versions prior to 22.1R1.

Timeline

  1. ID reserved

    By juniper

  2. · 4 months later

    Published

  3. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2022-22186, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.1High7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
NVDNVD · Modified3.1Medium6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS (exploitation in 30 days)
0.64% · top 49% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • affected unspecified – < 19.1R3-S8
    • affected 19.2 – < 19.2R3-S5
    • affected 19.3 – < 19.3R3-S5
    • affected 19.4 – < 19.4R3-S7
    • affected 20.1 – < 20.1R3-S3
    • affected 20.2 – < 20.2R3-S4
    • affected 20.3 – < 20.3R3-S3
    • affected 20.4 – < 20.4R3-S2
    • affected 21.1 – < 21.1R3-S1
    • affected 21.2 – < 21.2R3
    • affected 21.3 – < 21.3R2
    • affected 21.4 – < 21.4R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: 19.1R3-S8, 19.2R3-S5, 19.3R3-S5, 19.4R3-S7, 20.1R3-S3, 20.2R3-S4, 20.3R3-S3, 20.4R3-S2, 21.1R3-S1, 21.2R3, 21.3R2, 21.4R2, 22.1R1, and all subsequent releases.

Workaround: Disabling the net.transit_re sysctl flag will also cause management traffic forwarded to the PFE ports to be dropped: % sysctl -w net.transit_re=0 Note that sysctl flags do not survive a reboot.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .