Full Report
Good luck, sys admins
Analysis Summary
# Vulnerability: Cisco Catalyst SD-WAN Manager Privilege Escalation
## CVE Details
- **CVE ID:** CVE-2026-20245
- **CVSS Score:** High (Specific numerical score not provided in text, but classified as "high-severity")
- **CWE:** Improper Validation of User-Specified Input (CWE-20)
## Affected Systems
- **Products:** Cisco Catalyst SD-WAN Manager
- **Versions:** All versions of SD-WAN software.
- **Configurations:** All deployment types, including on-premises, cloud-based, and FedRAMP-certified deployments.
## Vulnerability Description
The vulnerability exists due to a validation error where the software fails to properly validate user-supplied input. This allows an authenticated, local attacker to upload a specially crafted file to the vulnerable system. Successful exploitation allows the attacker to escalate privileges and execute arbitrary commands with root-level permissions.
## Exploitation
- **Status:** **Exploited in the wild** (Zero-day status at time of report).
- **Complexity:** Medium (Requires existing administrative credentials).
- **Attack Vector:** Local (Requires local access/authenticated session).
- **Note:** Exploitation typically requires the attacker to have `netadmin` privileges, which the vendor suggests may be obtained via valid credentials or the prior exploitation of CVE-2026-20182 or CVE-2026-20127.
## Impact
- **Confidentiality:** High (Root-level command execution).
- **Integrity:** High (Full system control/command execution).
- **Availability:** High (Potential for system takeover or service disruption).
## Remediation
### Patches
- **No patch currently available** for CVE-2026-20245 as of the article date.
- Cisco recommends keeping systems updated to the latest available software (specifically versions released in May 2026) to remediate the dependencies/precursor vulnerabilities.
### Workarounds
- **Credential Hygiene:** Ensure strong authentication and monitor for compromised `netadmin` accounts.
- **Dependency Patching:** Upgrade to the software version fixing **CVE-2026-20182** to reduce the attack surface.
- **Access Control:** Restrict local access to the management interface to trusted personnel only.
## Detection
- **Indicators of Compromise:** Monitor for unusual file uploads to the SD-WAN Manager and unauthorized privilege escalation events.
- **Detection methods:** Audit system logs for command execution by `netadmin` level users that result in root privilege transitions.
## References
- Cisco Security Advisory (CVE-2026-20245): hxxps[://]sec[.]cloudapps[.]cisco[.]com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-privesc-4uxFrdzx
- Cisco Security Advisory (CVE-2026-20182): hxxps[://]sec[.]cloudapps[.]cisco[.]com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa2-v69WY2SW
- Cisco Security Advisory (CVE-2026-20127): hxxps[://]sec[.]cloudapps[.]cisco[.]com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-rpa-EHchtZk