Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability
Cisco — Cisco Catalyst SD-WAN Manager
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.
6.5
7.7%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Published
- Jun 15, 2026
- Modified
- Jun 17, 2026
- Added to KEV
- Jun 15, 2026
- Federal patch due
- Jun 29, 2026
CISA 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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2026-20262, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2026-20262 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2026-20262?
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.
How severe is CVE-2026-20262?
CVE-2026-20262 has a CVSS base score of 6.5 out of 10 (CVSS 3.1).
Is CVE-2026-20262 actively exploited in the wild?
Yes. CVE-2026-20262 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jun 15, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-20262?
7.7% - meaning FIRST.org's EPSS model estimates a 7.7% probability this vulnerability will be exploited in the wild within 30 days (94% percentile among all scored CVEs).
What type of vulnerability is CVE-2026-20262?
CVE-2026-20262 is classified under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')).
Cross-checked against
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