CVE-2026-20262: Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: yes — in CISA KEV since 2026-06-15
EPSS: 29.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-15 · updated 2026-07-24
Weakness: CWE-22

Description

A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system. This vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This file could later be used to elevate to root. To exploit this vulnerability, the attacker must have valid credentials with at least a lower-privileged, single-task user account.

Affected products

Cisco Catalyst SD-WAN Manager: before 20.9.9.2; from 20.10 before 20.12.7.2; from 20.13 before 20.15.4.5; from 20.15.5 before 20.15.5.3; from 20.16 before 20.18.3.1; from 26.1 before 26.1.1.2 — fixed in 20.12.7.2, 20.15.4.5, 20.15.5.3, 20.18.3.1, 20.9.9.2, 26.1.1.2

How to fix

Upgrade to a fixed version: Cisco Catalyst SD-WAN Manager 20.12.7.2, 20.15.4.5, 20.15.5.3, 20.18.3.1. Check the vendor advisory for mitigations.

References

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