Cisco IOS XR Software for ASR 9000 Series Routers IPv4 Unicast Packets Denial of Service Vulnerability

Summary by Cyber Security News21 Oct 2026, 16:00 CET

About this summary. This is a short excerpt from the description that Cisco PSIRT published with its article. Cyber Security News did not report or verify the underlying story. Read the original: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asr9k-tUyxcyXN?vs_f=Cisco%20Security%20Advisory%26vs_cat%3DSecurity%20Intelligence%26vs_type%3DRSS%26vs_p%3DCisco%20IOS%20XR%20Software%20for%20ASR%209000%20Series%20Routers%20IPv4%20Unicast%20Packets%20Denial%20of%20Service%20Vulnerability%26vs_k%3D1

A vulnerability in the IPv4 packet processing functionality of Cisco IOS XR Software that affects Cisco ASR 9000 and 9900 Series Aggregation Services Routers as well as Cisco ASR 9902 and 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause network processor (NP) errors, resulting in a line card reset or shutdown and a denial of service (DoS) condition.

Read the full article at Cisco PSIRT →

Source attribution: headline and facts are from Cisco PSIRT (sec.cloudapps.cisco.com). Summary method: excerpt of the source description. See our source attribution policy.

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