Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability

Cisco Catalyst SD-WAN Manger

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. Added to CISA KEV on 2026-04-20 (federal deadline 2026-04-23).

First seen: 20 Apr 2026
Last update: 20 Apr 2026, 12:00 UTC
Identifiers: CVE-2026-20122
Source: CISA KEV
On the menu as: VPN & firewalls

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: Cisco Catalyst SD-WAN Manger
Ids: CVE-2026-20122

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. Added to CISA KEV on 2026-04-20 (federal deadline 2026-04-23).

## Steps
1. This touches infrastructure (vpn-edge). Look in terraform, ansible, cloud-init, Dockerfiles and docs for the product and version we run. If it isn't in the repo, say so and list what a human should check on the box.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-20122") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://nvd.nist.gov/vuln/detail/CVE-2026-20122 https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems
https://pwned.coffee/i/cisco-catalyst-sd-wan-manager-incorrect-use-of-privilege-cve-2026-20122

Sources

Totalone hot coffee