5.8

CVE-2026-20058: cisco cisco secure firewall threat defense (ftd) software

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

Vulnerability summary

CVE-2026-20058 is a medium (CVSS 5.8) vulnerability in cisco cisco secure firewall threat defense (ftd) software. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.2% 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
0.40%
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

Multiple Cisco products are affected by vulnerabilities in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. These vulnerabilities are due to improper error checking when decompressing VBA data. An attacker could exploit these vulnerabilities by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to unexpectedly restart, causing a DoS condition.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

+0.01 pp

From 0.39% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.40%

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

Cisco5 products
  • cisco secure firewall threat defense (ftd) software7.2.0 | 7.2.0.1 | 7.2.1 | 7.3.0 | 7.2.2 | 7.2.3 | 7.3.1 | 7.2.4 | 7.2.5 | 7.2.4.1 | 7.3.1.1 | 7.4.0 | 7.2.5.1 | 7.4.1 | 7.2.6 | 7.4.1.1 | 7.2.7 | 7.2.5.2 | 7.3.1.2 | 7.2.8 | 7.6.0 | 7.4.2 | 7.2.8.1 | 7.4.2.1 | 7.2.9 | 7.7.0 | 7.4.2.2 | 7.2.10 | 7.6.1 | 7.4.2.3 | 7.6.2 | 7.7.10 | 7.6.2.1 | 7.7.10.1 | 7.4.2.4 | 7.2.10.2 | 7.4.3
  • cisco utd snort ips engine software17.9.3a | 17.12.1a | 17.12.2 | 17.13.1a | 17.9.5a | 17.12.3 | 17.14.1a | 17.12.4 | 17.12.3a | 17.15.1a | 17.9.6 | 17.16.1a | 17.12.4a | 17.15.2c | 17.12.4b | 17.15.2a | 17.12.5 | 17.17.1 | 17.12.5a | 17.15.3a | 17.15.3 | 17.12.5b | 17.12.5c | 17.15.4 | 17.18.1 | 17.18.1a | 17.12.6 | 17.15.4c | 17.12.5d | 17.18.2
  • secure_firewall_threat_defense7.2.0 | 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 | 7.4.3 | 7.6.0 | 7.6.1 | 7.6.2 | 7.6.2.1 | 7.7.0 | 7.7.10 | 7.7.10.1
  • snort≥ 3.0.0-233, < 3.9.6.0
  • unified_threat_defense_snort_intrusion_prevention_system_engine17.9.3a | 17.9.5a | 17.9.6 | 17.12.1a | 17.12.2 | 17.12.3 | 17.12.3a | 17.12.4 | 17.12.4a | 17.12.4b | 17.12.5 | 17.12.5a | 17.12.5b | 17.12.5c | 17.12.5d | 17.12.6 | 17.13.1a | 17.14.1a | 17.15.1a | 17.15.2a | 17.15.2c | 17.15.3 | 17.15.3a | 17.15.4 | 17.15.4c | 17.16.1a | 17.17.1 | 17.18.1 | 17.18.1a | 17.18.2

1 vendor · 5 products

References

1 links