1name: crowdsecurity/vpatch-CVE-2026-20127
2description: 'Detects path traversal file upload exploitation in Cisco Catalyst SD-WAN Manager (CVE-2026-20127)'
3rules:
4  - and:
5      - zones:
6          - URI
7        transform:
8          - urldecode
9          - lowercase
10        match:
11          type: contains
12          value: '/dataservice/smartlicensing/uploadack'
13      - zones:
14          - FILENAMES
15        transform:
16          - urldecode
17          - lowercase
18        match:
19          type: contains
20          value: '..'
21
22labels:
23  type: exploit
24  service: http
25  confidence: 3
26  spoofable: 0
27  behavior: 'http:exploit'
28  label: 'Cisco SD-WAN vManage - RCE'
29  classification:
30    - cve.CVE-2026-20127
31    - attack.T1190
32    - cwe.CWE-22
33    - cwe.CWE-434