Answer in brief
CVE-2026-5268 records a Critical severity (CVSS 9.1) vulnerability in SFTP Server Authentication Weakness. The current sources do not mark it as known exploited. The current feed maps CIENA/6500 S-Series (generic), CIENA/6500 T-Series (generic), CIENA/CPL (generic), CIENA/PTS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps CIENA/6500 S-Series (generic), CIENA/6500 T-Series (generic), CIENA/CPL (generic), CIENA/PTS (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| CIENA/6500 S-Seriesgeneric | R16.96 and prior | Not reported |
| CIENA/6500 T-Seriesgeneric | R16.1 and prior | Not reported |
| CIENA/CPLgeneric | R12.63 and prior | Not reported |
| CIENA/PTSgeneric | R16.1 and prior | Not reported |
Published upstream
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-5268 records a Critical severity (CVSS 9.1) vulnerability in SFTP Server Authentication Weakness. The current sources do not mark it as known exploited. The current feed maps CIENA/6500 S-Series (generic), CIENA/6500 T-Series (generic), CIENA/CPL (generic), CIENA/PTS (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps CIENA/6500 S-Series (generic), CIENA/6500 T-Series (generic), CIENA/CPL (generic), CIENA/PTS (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| CIENA/6500 S-Seriesgeneric | R16.96 and prior | Not reported |
| CIENA/6500 T-Seriesgeneric | R16.1 and prior | Not reported |
| CIENA/CPLgeneric | R12.63 and prior | Not reported |
| CIENA/PTSgeneric | R16.1 and prior | Not reported |
Published upstream
Jul 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.