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Actively exploited · Published Jun 4, 2026 · Assigned by cisco

CVE-2026-20245Cisco Catalyst SD-WAN Controller Authenticated Privilege Escalation Vulnerability

High 7.8 Exploited

In plain English

A high-severity security flaw in Cisco Catalyst SD-WAN Controller from Cisco. Attackers are actively exploiting it in the wild (listed by CISA on June 9, 2026). The chance it is exploited in the next 30 days is estimated at 25.3% (higher than 98% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)25.3%top 2.0% of all CVEs
Exploited in the wildYesCISA KEV since Jun 9, 2026
Attack tooling1Public PoC

CISA guidance

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Federal agencies must remediate by Jun 23, 2026.

Official description

A vulnerability in the CLI of Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, and Cisco Catalyst SD-WAN Validator, formerly SD-WAN vBond, could allow an authenticated, local attacker to execute arbitrary commands as root by supplying a crafted file to the affected system. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by uploading a crafted file to the affected system. A successful exploit could allow the attacker to perform command injection attacks on an affected system and elevate their privileges as the root user. To exploit this vulnerability, the attacker must have netadmin privileges on the affected system. This would require valid credentials or exploitation of or . Cisco is not aware of successful exploitation by other methods. Cisco has observed limited cases where the exploitation of this bug resulted in a configuration change pushed to edge devices. Cisco recommends that customers upgrade to the fixed software that is documented in the that was published on May 14, 2026, and verify the configuration of the edge devices.

Affected products (as reported)

VendorProductVersions
Cisco Cisco Catalyst SD-WAN Controller 20.6.420.9.220.3.620.7.220.7.120.5.120.6.219.3.0
Cisco Cisco Catalyst SD-WAN Manager 20.1.1219.2.118.4.418.4.520.1.1.120.1.119.3.019.2.2

Weakness: CWE-116 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References