CVE-2026-5268: SFTP Server Authentication Weakness
CIENA · 6500 S-Series
Vendor fix available · Affected: CIENA 6500 S-Series · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 52% of scored CVEs
DescriptionCVE.org
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.
Affected products4
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- CIENA · 6500 S-SeriesR16.96 and prior
- CIENA · 6500 T-SeriesR16.1 and prior
- CIENA · PTSR16.1 and prior
- CIENA · CPLR12.63 and prior
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Published
- July 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-5268 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.