CVE-2026-5268
SFTP Server Authentication Weakness
Description
An authentication bypass vulnerability exists in the default SFTP server component utilized across the Ciena products listed. This vulnerability allows a remote, unauthenticated attacker to bypass security controls and gain unauthorized access to the underlying filesystem. Successful exploitation could allow an attacker to read or modify system files.
INFO
Published Date :
July 6, 2026, 4:16 p.m.
Last Modified :
July 6, 2026, 4:16 p.m.
Remotely Exploit :
No
Source :
7bd90cf1-1651-495e-9ae8-9415fb3c9feb
Affected Products
The following products are affected by CVE-2026-5268
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the SFTP server component.
- Apply vendor-supplied security patches.
- Disable SFTP if not required.
- Restrict SFTP access to trusted networks.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-5268.
| URL | Resource |
|---|---|
| https://www.ciena.com/product-security |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5268 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-5268
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-5268 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-5268 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 7bd90cf1-1651-495e-9ae8-9415fb3c9feb
Jul. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'CIENA', 'product': '6500 S-Series', 'versions': [{'status': 'affected', 'version': 'R16.96 and prior'}], 'defaultStatus': 'affected'}, {'vendor': 'CIENA', 'product': '6500 T-Series', 'versions': [{'status': 'affected', 'version': 'R16.1 and prior'}], 'defaultStatus': 'affected'}, {'vendor': 'CIENA', 'product': 'PTS', 'versions': [{'status': 'affected', 'version': 'R16.1 and prior'}], 'defaultStatus': 'affected'}, {'vendor': 'CIENA', 'product': 'CPL', 'versions': [{'status': 'affected', 'version': 'R12.63 and prior'}], 'defaultStatus': 'affected'}] Added Description An authentication bypass vulnerability exists in the default SFTP server component utilized across the Ciena products listed. This vulnerability allows a remote, unauthenticated attacker to bypass security controls and gain unauthorized access to the underlying filesystem. Successful exploitation could allow an attacker to read or modify system files. Added CWE CWE-288 Added Reference https://www.ciena.com/product-security