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
Published Dec 1, 2017
6.4
MEDIUMCVSS 3.1
EPSS 0.34%
Description
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.
Affected products
- Vendor n/a Product Cisco Umbrella Virtual Appliance Version 2.0.3 and prior Defaultn/a
- Version Cisco Umbrella Virtual Appliance Version 2.0.3 and priorStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Cisco Umbrella Virtual Appliance Version 2.0.3 and prior | n/a |
|
- < 2.1.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:H/Au:S/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.34% (0.00338) | 24.80th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.34% (0.00338) | 27.30th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.06% (0.00062) | 27.18th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.06% (0.00062) | 27.05th | v3 (v2023.03.01) |
| Sep 15, 2023 | 0.06% (0.00062) | 25.00th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00059) | 22.80th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
No CWE recorded.
References (5)
- http://www.securityfocus.com/bid/101567 vdb-entryThird Party AdvisoryVDB Entry
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-tunnel-gJw5thgE vendor-advisoryVendor 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
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/101567 | vdb-entryThird Party AdvisoryVDB Entry | |
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-tunnel-gJw5thgE | vendor-advisoryVendor 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 |
Change history (0)
No recorded changes yet.