CVE-2026-20133
Published 2026-02-25 · Updated 2026-06-17 · Source psirt@cisco.com
Summary
CVE-2026-20133 is a medium-severity (CVSS 6.5) vulnerability in Cisco Catalyst SD-WAN Manager. CISA added it to the Known Exploited Vulnerabilities catalog on April 20, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 23, 2026. CISA does not currently list it as used in ransomware campaigns. Cisco has 101 vulnerabilities in the KEV catalog, 7 of them linked to ransomware.
All 101 known-exploited Cisco vulnerabilities →Description
A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. This vulnerability is due to insufficient file system restrictions. An authenticated attacker with netadmin privileges could exploit this vulnerability by accessing the vshell of an affected system. A successful exploit could allow the attacker to read sensitive information on the underlying operating system.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA Known-Exploited Vulnerability
Product: Cisco — Catalyst SD-WAN Manager
Name: Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
Date added: 2026-04-20 · Due: 2026-04-23
Required action: Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.