CVE-2024-39537Network attack vector

Information disclosure and disruption via exposed internal ports

Published Jul 11, 2024 · Updated Aug 2, 2024

Improper endpoint restriction in Junos OS Evolved on ACX 7000 Series allows remote attackers to disclose information and disrupt service. Incorrect process initialization exposes network ports for processes intended to accept only internal device communications. No authentication or user interaction is required, and the reported consequences are limited to information disclosure and device availability.

CVSS severity6.9
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper endpoint restriction in Junos OS Evolved on ACX 7000 Series allows remote attackers to disclose information and disrupt service. Incorrect process initialization exposes network ports for processes intended to accept only internal device communications. No authentication or user interaction is required, and the reported consequences are limited to information disclosure and device availability.

The record

CVE
CVE-2024-39537
Published
Jul 11, 2024
Updated
Aug 2, 2024
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-923, CAPEC-161, CAPEC-697, CAPEC-501, CAPEC-481, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=0 <21.4r3-s7
  2. Affected versionversion=0 <21.4R3-S7-EVO
  3. Affected versionversion=22.2 <22.2r3-s4
  4. Affected versionversion=22.2-EVO <22.2R3-S4-EVO
  5. Affected versionversion=22.3 <22.3r3-s3
  6. Affected versionversion=22.3-EVO <22.3R3-S3-EVO
  7. Affected versionversion=22.4 <22.4r3-s2
  8. Affected versionversion=22.4-EVO <22.4R3-S2-EVO
  9. Affected versionversion=23.2 <23.2r2
  10. Affected versionversion=23.2-EVO <23.2R2-EVO
  11. Affected versionversion=23.4 <23.4r1-s1
  12. Affected versionversion=23.4 <23.4r2
  13. Affected versionversion=23.4-EVO <23.4R1-S1-EVO, 23.4R2-EVO

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <21.4r3-s7; version=0 <21.4R3-S7-EVO; version=22.2 <22.2r3-s4; version=22.2-EVO <22.2R3-S4-EVO; version=22.3 <22.3r3-s3; version=22.3-EVO <22.3R3-S3-EVO; version=22.4 <22.4r3-s2; version=22.4-EVO <22.4R3-S2-EVO; version=23.2 <23.2r2; version=23.2-EVO <23.2R2-EVO; version=23.4 <23.4r1-s1; version=23.4 <23.4r2; version=23.4-EVO <23.4R1-S1-EVO, 23.4R2-EVO

Published CVSS scores

6.9Juniper NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
6.5Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

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-923Improper Restriction of Communication Channel to Intended Endpoints
CAPEC-161Infrastructure Manipulation
CAPEC-697DHCP Spoofing
CAPEC-501Android Activity Hijack
CAPEC-481Contradictory Destinations in Traffic Routing Schemes
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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