cvedb.io
CVE-2025-20241
HIGH · CVSS 7.4
EPSS exploitation probability: 0%
Published 2025-08-27T17:15:34.650 · Last modified 2026-06-17T08:41:10.377

Summary

A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the IS-IS process to unexpectedly restart, which could cause an affected device to reload. This vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device. A successful exploit could allow the attacker to cause the unexpected restart of the IS-IS process, which could cause the affected device to reload, resulting in a denial of service (DoS) condition. Note: The IS-IS protocol is a routing proto

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.