Vulnerability in Cisco 1100-4p Integrated Services Router

CVE-2021-1223

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of an HTTP range header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

EPSS: 0.020 (79.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-1223?
CVE-2021-1223 is a high-severity vulnerability in Cisco 1100-4p Integrated Services Router, classified under Protection Mechanism Failure. CVSS score: 7.5/10. Published 2021-01-13.
How severe is CVE-2021-1223?
High severity. CVSS v3 base score is 7.5 out of 10.