A vulnerability in Cisco NX-OS System Software running on Cisco MDS Multilayer Director Switches, Cisco Nexus 7000 Series Switches, and Cisco Nexus 7700 Series Switches could allow an authenticated, local attacker to access the Bash shell of an affected device's operating system, even if the Bash shell is disabled on the system
Published Nov 30, 2017
4.2
MEDIUMCVSS 3.0
EPSS 0.34%
Description
A vulnerability in Cisco NX-OS System Software running on Cisco MDS Multilayer Director Switches, Cisco Nexus 7000 Series Switches, and Cisco Nexus 7700 Series Switches could allow an authenticated, local attacker to access the Bash shell of an affected device's operating system, even if the Bash shell is disabled on the system. The vulnerability is due to insufficient sanitization of user-supplied parameters that are passed to certain functions of the Python scripting sandbox of the affected system. An attacker could exploit this vulnerability to escape the scripting sandbox and enter the Bash shell of the operating system with the privileges of the authenticated user for the affected system. To exploit this vulnerability, the attacker must have local access to the affected system and be authenticated to the affected system with administrative or Python execution privileges. Cisco Bug IDs: CSCvd86513.
Affected products
- Vendor n/a Product Cisco Multilayer Director, Nexus 7000 Series, and Nexus 7700 Series Switches Defaultn/a
- Version Cisco Multilayer Director, Nexus 7000 Series, and Nexus 7700 Series SwitchesStatusaffectedConstraints-
- 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 Multilayer Director, Nexus 7000 Series, and Nexus 7700 Series Switches | n/a |
|
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.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
AV:L/AC:L/Au:N/C:P/I:P/A:P
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.34% (0.00338) | 24.87th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.34% (0.00338) | 27.36th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00043) | 10.17th | v3 (v2023.03.01) |
| Jul 3, 2024 | 0.04% (0.00043) | 10.03th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01102) | 53.65th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.00% (0.01005) | 17.93th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.58% (0.00584) | 13.34th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.58% (0.00584) | 0.00th | v1 |
References (2)
- http://www.securityfocus.com/bid/102069 vdb-entryx_refsource_BID
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-switch x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/102069 | vdb-entryx_refsource_BID | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171129-switch | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.