The Cisco Umbrella Virtual Appliance Version 2.0.3 and prior contained an undocumented encrypted remote support tunnel (SSH) which auto initiated from the customer's appliance to Cisco's SSH Hubs in the Umbrella datacenters. These tunnels were primarily leveraged for remote support and allowed for authorized/authenticated personnel from the Cisco Umbrella team to access the appliance remotely and obtain full control without explicit customer approval. To address this vulnerability, the Umbrella Virtual Appliance version 2.1.0 now requires explicit customer approval before an SSH tunnel from the VA to the Cisco terminating server can be established.
結論預警: CVE-2017-6679 綜合評估為低風險（35.9/100）：CVSS 技術影響為中級，利用機率偏低（EPSS 0.37%） 強制指令: 持續追蹤利用情報與 EPSS 變化，並適時複評優先級。
風險隨態勢動態變化；本站持續評估並同步更新本頁展示內容。
EPSS 日更估計相對被利用可能性；百分位表示該 CVE 在已評分漏洞中的相對排名（越高表示相對更嚴重）。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化（新 − 舊） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.10% | 0.37% | +0.27% |
| 2 | 2025-03-30 | 0.26% | 0.10% | -0.15% |
| 3 | 2025-03-29 | — | 0.26% | — |
完整 EPSS 歷史 （共 6 筆）
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 6.4 | 3.1 | MEDIUM |
|
0.5 | 5.9 | [email protected] |
| 6.0 | 2.0 | MEDIUM |
|
1.5 | 10.0 | [email protected] |
| 廠商 | 產品 | 版本 | 原始 CPE |
|---|---|---|---|
| cisco | umbrella_virtual_appliance | < 2.1.0 | cpe:2.3:a:cisco:umbrella_virtual_appliance:*:*:*:*:*:*:*:* |
| URL | 標籤 |
|---|---|
| http://www.securityfocus.com/bid/101567 | Third Party Advisory VDB Entry |
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-tunnel-gJw5thgE | Vendor Advisory |
| https://support.umbrella.com/hc/en-us/articles/115004154423 | Third Party Advisory |
| https://support.umbrella.com/hc/en-us/articles/115004752143-Virtual-Appliance-Vulnerability-due-to-always-on-SSH-Tunnel-RESOLVED-2017-09-15 | Third Party Advisory |
| https://www.info-sec.ca/advisories/Cisco-Umbrella.html | Third Party Advisory |