CVE-2015-5361Network attack vector

Unauthenticated TCP-port access via broad FTPS gate

Published Feb 28, 2020 · Updated Sep 16, 2024

Network policy bypass in Juniper Networks Junos OS on SRX Series allows remote attackers to access any TCP port on a protected FTPS server. The FTP ALG cannot inspect the encrypted control channel, so ftps-extensions opens a client-to-server gate covering every destination TCP port. Exposure requires the non-default option on an SRX protecting the server and lasts until the associated control session closes.

CVSS severity6.5
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Network policy bypass in Juniper Networks Junos OS on SRX Series allows remote attackers to access any TCP port on a protected FTPS server. The FTP ALG cannot inspect the encrypted control channel, so ftps-extensions opens a client-to-server gate covering every destination TCP port. Exposure requires the non-default option on an SRX protecting the server and lasts until the associated control session closes.

The record

CVE
CVE-2015-5361
Published
Feb 28, 2020
Updated
Sep 16, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-326
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 28, 2020CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5MITRECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
5.8NIST NVDAV:N/AC:M/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-326Inadequate Encryption Strength

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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