CVE entry · CVE-2026-20122
CVE-2026-20122: Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability
Cisco Catalyst SD-WAN Manager contains an incorrect use of privileged APIs vulnerability 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.
- Actively exploited: added to CISA’s KEV catalog on April 20, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: April 23, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes Cisco Catalyst SD-WAN Manger, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (sec.cloudapps.cisco.com)
- NVD entry (NIST)
- CISA KEV catalog
Other Cisco vulnerabilities
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Cisco Secure Email Gateway Relative Path Traversal Vulnerability
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Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability
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Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
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Cisco Secure Email Gateway SQL Injection Vulnerability
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Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability
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Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability