CVE-2025-20115

A vulnerability in confederation implementation for the Border Gateway Protocol (BGP) in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to a memory corruption that occurs when a BGP update is created with an AS_CONFED_SEQUENCE attribute that has 255 autonomous system numbers (AS numbers). An attacker could exploit this vulnerability by sending a crafted BGP update message, or the network could be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more. A successful exploit could allow the attacker to cause memory corruption, which may cause the BGP process to restart, resulting in a DoS condition. To exploit this vulnerability, an attacker must control a BGP confederation speaker within the same autonomous system as the victim, or the network must be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more.

• CWE-120

• https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/Third Party Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-bgp-dos-O7stePhXVendor Advisory

Published

Mar 12, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2025-2011The Slider & Popup Builder by Depicter plugin for WordPress …7.5
• CVE-2025-20110Rejected reason: This CVE ID has been rejected or withdrawn …
• CVE-2025-20111A vulnerability in the health monitoring diagnostics of Cisc…7.4
• CVE-2025-20112A vulnerability in multiple Cisco Unified Communications and…5.1
• CVE-2025-20113A vulnerability in Cisco Unified Intelligence Center could a…7.1
• CVE-2025-20114A vulnerability in the API of Cisco Unified Intelligence Cen…4.3
• CVE-2025-20116A vulnerability in the web UI of Cisco APIC could allow an a…4.8
• CVE-2025-20117A vulnerability in the CLI of Cisco APIC could allow an auth…6.7
• CVE-2025-20118A vulnerability in the implementation of the internal system…4.4
• CVE-2025-20119A vulnerability in the system file permission handling of Ci…5.7
• CVE-2025-2012Ashlar-Vellum Cobalt VS File Parsing Out-Of-Bounds Read Remo…7.8
• CVE-2025-20120A vulnerability in the web-based management interface of Cis…6.1