CVE-2022-22163

Adjacent service crash via specific DHCPv6 message

Published Jan 19, 2022 · Updated Sep 16, 2024

Improper input validation in Juniper Networks Junos OS jdhcpd allows adjacent unauthenticated attackers to crash the daemon via DHCPv6. Juniper has not disclosed which DHCPv6 field jdhcpd mishandles or the exact validation failure that terminates the process. Exposure requires DHCPv6 local-server or relay persistent storage to be enabled, and exploitation interrupts the DHCP daemon.

CVSS severity7.4
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper input validation in Juniper Networks Junos OS jdhcpd allows adjacent unauthenticated attackers to crash the daemon via DHCPv6. Juniper has not disclosed which DHCPv6 field jdhcpd mishandles or the exact validation failure that terminates the process. Exposure requires DHCPv6 local-server or relay persistent storage to be enabled, and exploitation interrupts the DHCP daemon.

The record

CVE
CVE-2022-22163
Published
Jan 19, 2022
Updated
Sep 16, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-20, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=18.4 <18.4R3-S9
  2. Affected versionversion=19.1 <19.1R2-S3, 19.1R3-S7
  3. Affected versionversion=19.2 <19.2R1-S8, 19.2R3-S3
  4. Affected versionversion=19.4 <19.4R3-S5
  5. Affected versionversion=20.1 <20.1R3-S1
  6. Affected versionversion=20.2 <20.2R3-S2
  7. Affected versionversion=20.3 <20.3R3-S1
  8. Affected versionversion=20.4 <20.4R3
  9. Affected versionversion=21.1 <21.1R2
  10. Affected versionversion=21.2 <21.2R2
  11. Affected versionversion=unspecified <15.1R7-S11

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=18.4 <18.4R3-S9; version=19.1 <19.1R2-S3, 19.1R3-S7; version=19.2 <19.2R1-S8, 19.2R3-S3; version=19.4 <19.4R3-S5; version=20.1 <20.1R3-S1; version=20.2 <20.2R3-S2; version=20.3 <20.3R3-S1; version=20.4 <20.4R3; version=21.1 <21.1R2; version=21.2 <21.2R2; version=unspecified <15.1R7-S11

Published CVSS scores

6.5NISTCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.4Juniper Networks, Inc.CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
2.9NISTAV:A/AC:M/Au:N/C:N/I:N/A:P

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-20Improper Input Validation
T1499.004Endpoint Denial of Service: Application 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo