CVE-2022-22206Network attack vector

PFE crash via unchecked safe-search traffic copy

Published Jul 20, 2022 · Updated Sep 16, 2024

Buffer overflow in the PFE of Juniper Networks Junos OS on SRX Series allows remote attackers to crash the PFE with crafted traffic. When UTM Enhanced Web Filtering safe-search scans specific traffic, the PFE copies input without checking its size and crashes. The flaw is reachable without authentication only when that feature scans the traffic; repeated delivery sustains the service interruption.

CVSS severity7.5
High
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the PFE of Juniper Networks Junos OS on SRX Series allows remote attackers to crash the PFE with crafted traffic. When UTM Enhanced Web Filtering safe-search scans specific traffic, the PFE copies input without checking its size and crashes. The flaw is reachable without authentication only when that feature scans the traffic; repeated delivery sustains the service interruption.

The record

CVE
CVE-2022-22206
Published
Jul 20, 2022
Updated
Sep 16, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 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=20.2 <20.2R3-S4
  2. Affected versionversion=20.3 <20.3R3-S3
  3. Affected versionversion=20.4 <20.4R3-S3
  4. Affected versionversion=21.1 <21.1R3-S1
  5. Affected versionversion=21.2 <21.2R2-S2, 21.2R3
  6. Affected versionversion=21.3 <21.3R2
  7. Affected versionversion=21.4 <21.4R2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=20.2 <20.2R3-S4; version=20.3 <20.3R3-S3; version=20.4 <20.4R3-S3; version=21.1 <21.1R3-S1; version=21.2 <21.2R2-S2, 21.2R3; version=21.3 <21.3R2; version=21.4 <21.4R2

Published CVSS scores

7.5Juniper Networks, Inc.CVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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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