PT-2026-49259 · Cisco · Catalyst Sd-Wan Manager

Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-20262

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Cisco Catalyst SD-WAN Manager (affected versions not specified)

Description A flaw in the web UI of Cisco Catalyst SD-WAN Manager (formerly SD-WAN vManage) allows an authenticated, remote attacker to create or overwrite any file on the underlying operating system. This occurs because the software fails to properly validate user-supplied input during a file upload process. An attacker with at least a lower-privileged, single-task user account can exploit this by sending a crafted HTTP request to an affected API endpoint. This issue has been exploited in zero-day attacks to achieve privilege escalation to root.

Recommendations Update to the latest security updates released by Cisco. As a temporary mitigation, restrict access to the file upload API endpoint to only highly trusted administrators.

Fix

LPE

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-20262

Affected Products

Catalyst Sd-Wan Manager

References · 5

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20262 · Security Note
• https://twitter.com/trubetech/status/2066570787671175652 · Twitter Post
• https://twitter.com/the_yellow_fall/status/2066559688452513983 · Twitter Post
• https://twitter.com/nims213/status/2066571973388353913 · Twitter Post