Threats Tagged 'cve-2026-20245'

In early 2026, a threat actor targeted SD-WAN infrastructure at a service provider, exploiting a zero-day vulnerability in Cisco Catalyst SD-WAN to escalate privileges. The attacker initially gained access through unauthorized peering connections and manipulated default account passwords. They then exploited CVE-2026-20245, a privilege escalation flaw in the file upload feature, by uploading a malicious CSV file to achieve root-level access. The vulnerability allowed the creation of a privileged user account through manipulation of system password files. Throughout the intrusion, the threat actor employed extensive anti-forensic techniques, systematically deleting malicious files, restoring modified system configurations, and executing validation scripts to ensure removal of indicators. This campaign demonstrates the living off the edge paradigm, where adversaries compromise network appliances to bypass traditional security perimeters and maintain persistent access.

CriticalVulnerabilityUnited StatesCanadaUnited Kingdom+12#cve#cve-2026-20127#credential manipulation

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.