CVE-2026-5268
SFTP Server Authentication Weakness
- State
- Published
- Severity
- 9.1 Critical
- Published
- Jul 6, 2026
- Updated
- Jul 8, 2026
- Reserved
- Mar 31, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | CISA-ADP |
Weaknesses
- CWE-288 Authentication bypass using an alternate path or channel
Affected Products
| Product | Versions |
|---|---|
6500 S-SeriesCIENA |
|
6500 T-SeriesCIENA |
|
PTSCIENA |
|
CPLCIENA |
|
References
- https://www.ciena.com/product-securityvendor-advisory
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