Vulnerability Description
A vulnerability in the access control list (ACL) processing in the egress direction of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability exists because certain packets are handled incorrectly when they are received on an ingress interface on one line card and destined out of an egress interface on another line card where the egress ACL is configured. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an egress ACL on the affected device. For more information about this vulnerability, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xr | 6.5.1 |
| Cisco | 8608 | - |
| Cisco | 8804 | - |
| Cisco | 8808 | - |
| Cisco | 8812 | - |
| Cisco | 8818 | - |
| Cisco | Ncs 5504 | - |
| Cisco | Ncs 5508 | - |
| Cisco | Ncs 5516 | - |
Related Weaknesses (CWE)
References
- https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/Technical Description
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ciVendor Advisory
FAQ
What is CVE-2025-20145?
CVE-2025-20145 is a vulnerability with a CVSS score of 5.8 (MEDIUM). A vulnerability in the access control list (ACL) processing in the egress direction of Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnera...
How severe is CVE-2025-20145?
CVE-2025-20145 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-20145?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xr, Cisco 8608, Cisco 8804, Cisco 8808, Cisco 8812.