CVE-2026-20122
Cisco Catalyst SD-WAN Manager Arbitrary File Overwrite Vulnerability
Description
A vulnerability in the API of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to overwrite arbitrary files on the local file system. To exploit this vulnerability, the attacker must have valid read-only credentials with API access on the affected system. This vulnerability is due to improper file handling on the API interface of an affected system. An attacker could exploit this vulnerability by uploading a malicious file on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on the affected system and gain vmanage user privileges.
Weakness: CWE-648
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager | Network & Security Management | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Catalyst SD-WAN Manager
Vendor advisory
cisco-sa-sdwan-authbp-qwCX8D4v
Cisco Catalyst SD-WAN Vulnerabilities
Cisco’s rating: Critical (advisory CVSS 9.8) · Published Feb 25, 2026 · updated Apr 22, 2026 (revision 1.3)
Bug IDs: CSCws33583 , CSCws33584 , CSCws33585 , CSCws33586 , CSCws33587 , CSCws93470
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from