5.8

CVE-2026-20007: cisco cisco secure firewall threat defense (ftd) software Improper Access Control

CVSS: 5.8v3.1MediumAnalyzed
Published 04-03-2026Last modified 04-03-2026
Open JSON

Vulnerability summary

CVE-2026-20007 is a medium (CVSS 5.8) Improper Access Control vulnerability in cisco cisco secure firewall threat defense (ftd) software. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.2% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 04-03-2026
    PublishedVulnerability first disclosed.
  2. 04-03-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

+0.01 pp

From 0.23% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco2 products
  • cisco secure firewall threat defense (ftd) software6.4.0.1 | 6.4.0.2 | 6.4.0.5 | 6.4.0 | 6.4.0.3 | 6.4.0.4 | 6.4.0.6 | 6.4.0.7 | 6.4.0.8 | 6.4.0.9 | 6.4.0.10 | 6.4.0.11 | 6.4.0.12 | 7.0.0 | 7.0.0.1 | 7.0.1 | 7.1.0 | 6.4.0.13 | 7.0.1.1 | 6.4.0.14 | 7.1.0.1 | 7.0.2 | 6.4.0.15 | 7.2.0 | 7.0.2.1 | 7.0.3 | 7.1.0.2 | 7.2.0.1 | 7.0.4 | 7.2.1 | 7.0.5 | 6.4.0.16 | 7.3.0 | 7.2.2 | 7.2.3 | 7.3.1 | 7.1.0.3 | 7.2.4 | 7.0.6 | 7.2.5 | 7.2.4.1 | 7.3.1.1 | 7.4.0 | 6.4.0.17 | 7.0.6.1 | 7.2.5.1 | 7.4.1 | 7.2.6 | 7.0.6.2 | 7.4.1.1 | 6.4.0.18 | 7.2.7 | 7.2.5.2 | 7.3.1.2 | 7.2.8 | 7.6.0 | 7.4.2 | 7.2.8.1 | 7.0.6.3 | 7.4.2.1 | 7.2.9 | 7.0.7 | 7.7.0 | 7.4.2.2 | 7.2.10 | 7.6.1 | 7.4.2.3 | 7.0.8 | 7.6.2 | 7.0.8.1 | 7.6.2.1 | 7.4.2.4 | 7.2.10.2
  • secure_firewall_threat_defense6.4.0 | 6.4.0.1 | 6.4.0.2 | 6.4.0.3 | 6.4.0.4 | 6.4.0.5 | 6.4.0.6 | 6.4.0.7 | 6.4.0.8 | 6.4.0.9 | 6.4.0.10 | 6.4.0.11 | 6.4.0.12 | 6.4.0.13 | 6.4.0.14 | 6.4.0.15 | 6.4.0.16 | 6.4.0.17 | 6.4.0.18 | 7.0.0 | 7.0.0.1 | 7.0.1 | 7.0.1.1 | 7.0.2 | 7.0.2.1 | 7.0.3 | 7.0.4 | 7.0.5 | 7.0.6 | 7.0.6.1 | 7.0.6.2 | 7.0.6.3 | 7.0.7 | 7.0.8 | 7.0.8.1 | 7.1.0 | 7.1.0.1 | 7.1.0.2 | 7.1.0.3 | 7.2.0 | 7.2.0.1 | 7.2.1 | 7.2.2 | 7.2.3 | 7.2.4 | 7.2.4.1 | 7.2.5 | 7.2.5.1 | 7.2.5.2 | 7.2.6 | 7.2.7 | 7.2.8 | 7.2.8.1 | 7.2.9 | 7.2.10 | 7.2.10.2 | 7.3.0 | 7.3.1 | 7.3.1.1 | 7.3.1.2 | 7.4.0 | 7.4.1 | 7.4.1.1 | 7.4.2 | 7.4.2.1 | 7.4.2.2 | 7.4.2.3 | 7.4.2.4 | 7.6.0 | 7.6.1 | 7.6.2 | 7.6.2.1 | 7.7.0

1 vendor · 2 products

References

1 links