CVE-2022-22202

Sustained service interruption via specific MPLS packets

Published Jul 20, 2022 · Updated Sep 17, 2024

Improper exception handling in Juniper Networks Junos OS allows remote attackers to restart PTX forwarding cards with specific MPLS packets. The dcpfe process crashes while processing the packets and restarts the FPC; repeated processing sustains the service interruption. Exposure requires a listed PTX model with a specific FPC, multiple units on the ingress interface, and at least one unit without family mpls configured.

CVSS severity6.5

Medium

EPSS probability0.54%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2022-22202
Published: Jul 20, 2022
Updated: Sep 17, 2024

Vendor: Juniper Networks
Product: Junos OS
Classifications: CWE-755, T1499.004

Attack vector: adjacent
Privileges: unauthenticated

Timeline

How it unfolded

Jul 20, 2022CVE publishedPublication date reported by the CVE source.
Sep 17, 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.

Affected versionversion=19.2 <19.2R3-S6
Affected versionversion=19.3 <19.3R3-S6
Affected versionversion=19.4 <19.4R3-S8
Affected versionversion=20.1 <20.1R3-S4
Affected versionversion=20.2 <20.2R3-S5
Affected versionversion=20.3 <20.3R3-S4
Affected versionversion=20.4 <20.4R3-S4
Affected versionversion=21.1 <21.1R3-S2
Affected versionversion=21.2 <21.2R3-S1
Affected versionversion=21.3 <21.3R3
Affected versionversion=21.4 <21.4R2
Affected versionversion=22.1 <22.1R2
Affected versionversion=unspecified <19.1R3-S9

What conditions does exploitation require?

Attack vectoradjacent

Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=19.2 <19.2R3-S6; version=19.3 <19.3R3-S6; version=19.4 <19.4R3-S8; version=20.1 <20.1R3-S4; version=20.2 <20.2R3-S5; version=20.3 <20.3R3-S4; version=20.4 <20.4R3-S4; version=21.1 <21.1R3-S2; version=21.2 <21.2R3-S1; version=21.3 <21.3R3; version=21.4 <21.4R2; version=22.1 <22.1R2; version=unspecified <19.1R3-S9

Published CVSS scores

6.5Juniper Networks, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 10, 2026Sep 16, 2026

Latest reporting daySep 16, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectoradjacent

Privilegesunauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions

T1499.004Application or System Exploitation

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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