CVE-2022-22186Network attack vector

Traffic isolation bypass via uninitialized packet disposition

Published Apr 14, 2022 · Updated Sep 16, 2024

Improper initialization in Junos OS on EX4650 devices allows remote attackers to forward management-interface packets to egress ports. The EX4650 packet-processing path leaves traffic received on em0 without its intended drop disposition when the traffic is not addressed to the device, allowing normal egress forwarding. Reachability requires nonstandard traffic sent to the management interface, and successful exploitation bypasses intended traffic isolation without interrupting service.

CVSS severity7.2
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in Junos OS on EX4650 devices allows remote attackers to forward management-interface packets to egress ports. The EX4650 packet-processing path leaves traffic received on em0 without its intended drop disposition when the traffic is not addressed to the device, allowing normal egress forwarding. Reachability requires nonstandard traffic sent to the management interface, and successful exploitation bypasses intended traffic isolation without interrupting service.

The record

CVE
CVE-2022-22186
Published
Apr 14, 2022
Updated
Sep 16, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-665, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=19.2 <19.2R3-S5
  2. Affected versionversion=19.3 <19.3R3-S5
  3. Affected versionversion=19.4 <19.4R3-S7
  4. Affected versionversion=20.1 <20.1R3-S3
  5. Affected versionversion=20.2 <20.2R3-S4
  6. Affected versionversion=20.3 <20.3R3-S3
  7. Affected versionversion=20.4 <20.4R3-S2
  8. Affected versionversion=21.1 <21.1R3-S1
  9. Affected versionversion=21.2 <21.2R3
  10. Affected versionversion=21.3 <21.3R2
  11. Affected versionversion=21.4 <21.4R2
  12. Affected versionversion=unspecified <19.1R3-S8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=19.2 <19.2R3-S5; version=19.3 <19.3R3-S5; version=19.4 <19.4R3-S7; version=20.1 <20.1R3-S3; version=20.2 <20.2R3-S4; version=20.3 <20.3R3-S3; version=20.4 <20.4R3-S2; version=21.1 <21.1R3-S1; version=21.2 <21.2R3; version=21.3 <21.3R2; version=21.4 <21.4R2; version=unspecified <19.1R3-S8

Published CVSS scores

7.2Juniper Networks, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-665Improper Initialization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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