Cisco IOS Xr 7.4.1

Cisco IOS XR Software Security Hardening Release: September 2026

Cisco Network Services Orchestrator Configuration Update Authorization Bypass Vulnerability

Cisco IOS XR Software Security Hardening Release: September 2026

Cisco IOS XR Software Local Privilege Escalation Vulnerability

Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability

Cisco IOS XR Software for ASR 9000 Series Routers L2VPN Denial of Service Vulnerability

Cisco IOS, IOS XE and IOS XR Software TWAMP Denial of Service Vulnerability

Cisco IOS XR Software Security Hardening Release: September 2026

A vulnerability in the SSH client feature of Cisco IOS XR Software for Cisco 8000 Series Routers and Cisco Network Convergence System (NCS) 540 Series and 5700 Series Routers could allow an authenticated, local attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of arguments that are included with the SSH client CLI command. An attacker with low-privileged access to an affected device could exploit this vulnerability by issuing a crafted SSH client command to the CLI. A successful exploit could allow the attacker to elevate privileges to root on the affected device.

Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability

Cisco IOS XR Software Broadband Network Gateway PPPoE Denial of Service Vulnerability

Cisco IOS XR Software Image Verification Bypass Vulnerability

Cisco IOS XR Software Access Control List Bypass Vulnerability

Cisco IOS XR Software Access Control List Bypass Vulnerability

Cisco IOS XR Software CLI Arbitrary File Read Vulnerability

Cisco IOS XR Software Cisco Discovery Protocol Buffer Overflow Vulnerability

A vulnerability in the UDP forwarding code of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to bypass configured management plane protection policies and access the Simple Network Management Plane (SNMP) server of an affected device. This vulnerability is due to incorrect UDP forwarding programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by attempting to perform an SNMP operation using broadcast as the destination address that could be processed by an affected device that is configured with an SNMP server. A successful exploit could allow the attacker to communicate to the device on the configured SNMP ports. Although an unauthenticated attacker could send UDP datagrams to the configured SNMP port, only an authenticated user can retrieve or modify data using SNMP requests.