Path traversal in Cisco Network Services Orchestrator
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- None · Low · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
A vulnerability in the NETCONF service of Cisco Network Services Orchestrator (NSO) could allow an authenticated, remote attacker to cause a denial of service (DoS) on an affected system that is running as the root user. To exploit this vulnerability, the attacker must be a member of the admin group. This vulnerability exists because user-supplied input is not properly validated when NETCONF is used to upload packages to an affected device. An attacker could exploit this vulnerability by uploading a specially crafted package file. A successful exploit could allow the attacker to write crafted files to arbitrary locations on the filesystem or delete arbitrary files from the filesystem of an affected device, resulting in a DoS condition. Note: By default, during install, Cisco NSO will be set up to run as the root user unless the --run-as-user option is used.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cisco | Cisco Network Services Orchestrator | 4.7.3 | — | No fix listed | CNA |
- Cisco Network Services Orchestrator VendorCisco Affected 4.7.3 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-20040
- 2026-10-03 Alias added: GHSA-v96g-9h62-76pj
References
Advisory 1
More Cisco Network Services Orchestrator vulnerabilities
- TI-2025-23504 Erlang/OTP SSH Vulnerable to Pre-Authentication RCE KEVCVSS 3.1CRITICAL 10.0
- TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
- TI-2018-00233 Improper input validation in Cisco Network Services Orchestrator unknown CVSS 3.1HIGH 8.8
- TI-2021-00859 Cisco Network Services Orchestrator Path Traversal Vulnerability CVSS 3.1HIGH 7.5
- TI-2018-00422 Cisco Network Services Orchestrator Network Plug and Play Information Disclosure Vulnerability CVSS 3.0HIGH 7.5
- TI-2024-13314 Cisco Network Services Orchestrator Configuration Update Authorization Bypass Vulnerability CVSS 3.1HIGH 8.8
Sources
- CVE-2023-20040 · CVE Program
- CVE-2023-20040 · NVD
- FIRST EPSS
- GHSA-v96g-9h62-76pj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences