Path Traversal in Cisco Catalyst Sd-Wan Manager

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.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.282 (98.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

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.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-20262?
CVE-2026-20262 is a medium-severity vulnerability in Cisco Catalyst Sd-Wan Manager, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-06-15.
How severe is CVE-2026-20262?
Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2026-20262 known to be exploited?
Yes. CVE-2026-20262 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-06-15), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.