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CVE-2026-20007 PUBLISHED CVSS 5.800000190734863 MEDIUM

A vulnerability in the Snort 2 and Snort 3 deep packet inspection of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured Snort rules and allow traffic onto the network that should have been dropped. This vulnerability is due to a logic error in the integration of the Snort Engine rules with Cisco Secure FTD Software that could allow different Snort rules to be hit when deep inspection of the packet is performed for the inner and outer connections. An attacker could exploit this vulnerability by sending crafted traffic to a targeted device that would hit configured Snort rules. A successful exploit could allow the attacker to send traffic to a network where it should have been denied.

EPSS 0.03% · 8.4th percentile

Risk Scores

CVSS v3.1
5.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
EPSS Score
0.03%
8.4th percentile

Affected Products

VendorProductVersions
CiscoCisco Secure Firewall Threat Defense (FTD) Software6.4.0.1, 6.4.0.2, 6.4.0.5

Timeline

References

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