Detect Cisco Catalyst SD-WAN Manager Privileged API Abuse (CVE-2026-20122) in IBM QRadar
Detects exploitation of CVE-2026-20122, a critical vulnerability in Cisco Catalyst SD-WAN Manager involving incorrect use of privileged APIs (CWE-648). This KEV-listed flaw allows attackers to invoke privileged API endpoints without proper authorization, potentially enabling unauthorized configuration changes, credential harvesting, or full SD-WAN infrastructure takeover. Active exploitation has been observed in the wild per CISA Emergency Directive ED-26-03.
MITRE ATT&CK
QRadar Detection Query
SELECT
sourceip,
destinationip,
URL,
METHOD,
STATUSCODE,
COUNT(*) AS request_count,
COUNT(DISTINCT URL) AS unique_api_paths,
MIN(starttime) AS first_seen,
MAX(starttime) AS last_seen
FROM events
WHERE
LOGSOURCETYPENAME(devicetype) ILIKE '%cisco%sd-wan%'
OR LOGSOURCETYPENAME(devicetype) ILIKE '%vmanage%'
OR LOGSOURCETYPENAME(devicetype) ILIKE '%catalyst sd-wan%'
AND (
URL ILIKE '/dataservice/admin%'
OR URL ILIKE '/dataservice/system%'
OR URL ILIKE '/dataservice/device/action%'
OR URL ILIKE '/dataservice/template%'
OR URL ILIKE '/dataservice/settings/configuration%'
OR URL ILIKE '/dataservice/certificate%'
OR URL ILIKE '/dataservice/aaa%'
)
AND METHOD IN ('POST', 'PUT', 'DELETE', 'PATCH')
AND STATUSCODE IN ('200', '201', '204')
AND starttime > NOW() - 3600000
GROUP BY sourceip, destinationip, URL, METHOD, STATUSCODE
HAVING request_count >= 3 OR unique_api_paths >= 2
ORDER BY unique_api_paths DESC, request_count DESCQRadar AQL query identifying repeated successful access to Cisco SD-WAN Manager privileged API endpoints from the same source, correlating mutation methods and success responses consistent with CVE-2026-20122 exploitation.
Data Sources
Required Tables
False Positives & Tuning
- Authorized SD-WAN automation scripts running scheduled maintenance tasks via the management API
- SIEM integration connectors polling the SD-WAN Manager REST API for telemetry collection
- Cisco vBond or vSmart controller interactions with vManage during normal control plane operations
Other platforms for CVE-2026-20122
Testing Methodology
Validate this detection against 4 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Unauthenticated SD-WAN Manager Privileged API Probe
Expected signal: HTTP GET requests to /dataservice/admin/user, /dataservice/system/information, /dataservice/aaa/usergroup, /dataservice/certificate/list from the test host to port 8443, logged in vManage access logs and network flow.
- Test 2Privileged API Admin Account Creation Simulation
Expected signal: POST to /dataservice/aaa/user with a new username payload logged in vManage audit log, network capture showing the request body containing userName and group fields.
- Test 3SD-WAN Manager Template Enumeration and Exfiltration Simulation
Expected signal: Sequential GET requests to /dataservice/template/device, /dataservice/template/feature, /dataservice/device, and /dataservice/device/action/list within a short timeframe from a single source IP.
- Test 4Rapid Privileged API Burst from Single Source
Expected signal: 21+ HTTP requests across 7 distinct privileged API paths within seconds, all from the same source IP, logged in vManage access logs and network telemetry.
References (4)
- https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems
- https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v
- https://nvd.nist.gov/vuln/detail/CVE-2026-20122
Unlock Pro Content
Get the full detection package for CVE-2026-20122 including response playbook, investigation guide, and atomic red team tests.