CVE WatchJul 24, 2026

CVE-2026-20262

Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability

CVSS

6.5

Medium

EPSS

28.2%

p98

KEV

YES

Jun 15, 2026

Exploit Today

0-100

Published: Jun 15, 2026 · Last modified: Jul 24, 2026 · CWE-22

EPSS · 30d

28.2%EPSS · 30 days28.2%

2026-09-182026-10-15

KEV catalog record

Product

Cisco / Catalyst SD-WAN Manager

Vulnerability

Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability

Added to KEV

Jun 15, 2026

Remediate by

Jun 29, 2026

Known ransomware use

Summary description

Cisco Catalyst SD-WAN Manager contains a directory or path traversal vulnerability that could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.

Required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Notes

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20262

Technical 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.

Official references

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