CVE-2026-20133: Cisco Catalyst SD-WAN Manager information disclosure

CVE-2026-20133 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2026-04-20

Cisco Catalyst SD-WAN Manager, a centralized management platform for corporate wide-area networks, contains a vulnerability that allows unauthorized access to sensitive system information. An attacker could exploit this to view internal configuration data or operating system files, potentially leading to further network compromise. This vulnerability has been observed being used in active attacks, making immediate patching or mitigation a high priority.

Technologies: Cisco Catalyst SD-WAN Manager. Vendors: Cisco.

Quick answers

Is CVE-2026-20133 exploited in the wild?
Yes. CVE-2026-20133 is known to be exploited in the wild, first recorded on 20 April 2026. Treat it as urgent.
How severe is CVE-2026-20133?
Critical severity, with a CVSS score of 7.5, published 20 April 2026.
Which products and versions are affected?
Cisco Catalyst SD-WAN Manager < 20.9.8.2, 20.10.x < 20.12.5.3, 20.13.x < 20.15.4.2, 20.16.x < 20.18.2.1.
Is there a fix for CVE-2026-20133?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-20133 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-20133?
Check whether you run Cisco Catalyst SD-WAN Manager at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability in Cisco Catalyst SD-WAN Manager (formerly vManage) is classified as an Information Exposure (CWE-200). The root cause is insufficient file system access restrictions within the management software. While some descriptions suggest an authenticated 'netadmin' user accessing the 'vshell' is required, the NIST CVSS 3.1 assessment and CISA KEV inclusion indicate an unauthenticated remote attack vector via the system's API is possible. An attacker can exploit this to read sensitive files on the underlying operating system. This vulnerability is actively exploited in the wild. Patches are available in versions 20.9.8.2, 20.12.5.3, 20.15.4.2, and 20.18.2.1.

Affected products

  • Cisco Catalyst SD-WAN Manager < 20.9.8.2, 20.10.x < 20.12.5.3, 20.13.x < 20.15.4.2, 20.16.x < 20.18.2.1

Timeline

  • 2026-03-04: disclosed: Initial NIST analysis recorded
  • 2026-04-20: advisory: Cisco advisory published and CISA KEV inclusion
  • 2026-04-20: exploited: Vulnerability confirmed as exploited in the wild by CISA

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