What’s Vulnerable › Vulnerabilities

CVE-2026-20122: Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-04-20
• EPSS: 25.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-25 · updated 2026-06-17
• Weakness: CWE-648

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.

Affected products

• Cisco Catalyst SD-WAN Manager: before 20.9.8.2; from 20.10 before 20.12.5.3; from 20.13 before 20.15.4.2; from 20.16 before 20.18.2.1; 20.12.6 — fixed in 20.12.5.3, 20.15.4.2, 20.18.2.1, 20.9.8.2

How to fix

Upgrade to a fixed version: Cisco Catalyst SD-WAN Manager 20.12.5.3, 20.15.4.2, 20.18.2.1, 20.9.8.2. Check the vendor advisory for mitigations.

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20122

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