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CVE-2026-20262
MEDIUM · CVSS 6.5 ⚠ KEV — EXPLOITED
EPSS exploitation probability: 68%
⚠ Listed in the CISA Known Exploited Vulnerabilities catalog — actively exploited.
Published 2026-06-15 · Last modified 2026-07-23T11:10:00.120

Summary

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

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.