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CVE-2021-1236
MEDIUM · CVSS 5.3
EPSS exploitation probability: 80%
Published 2021-01-13T22:15:20.583 · Last modified 2026-08-11T19:37:30.880

Summary

Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. The vulnerability is due to a flaw in the detection algorithm. An attacker could exploit this vulnerability by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network.

Affected products

cisco — ios_xe

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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.