Cisco Secure Firewall Threat Defense (FTD) Software 6.6.0 when installed on Cisco Firepower 4100 Series

productUS

A product tracked in the threat graph; the vulnerabilities below are known to affect it.

by severity
1critical45high43medium0low
updated 2026-10-28
01

vulnerabilities (119)

Related CVEs.

IDseverity exploitable
CVE-2020-3452UShigh7.5OT criticalKEV
CVE-2025-20362UShigh8.6OT criticalKEV
CVE-2020-3580USmedium6.1OT criticalKEV
CVE-2025-20333US—OT criticalKEV
CVE-2024-20353UShigh8.6OT criticalKEV
CVE-2023-20269UScritical9.1OT criticalKEV
CVE-2024-20359USmedium6.0OT criticalKEV
CVE-2024-20481USmedium5.8OT criticalKEV
CVE-2022-20759UShigh8.8—
CVE-2025-20363US——
CVE-2020-3304UShigh8.6—
CVE-2020-3554UShigh7.5—
CVE-2021-40114UShigh7.5—
CVE-2021-1224USmedium5.3—
CVE-2021-1223UShigh7.5—
CVE-2020-3436UShigh8.6—
CVE-2022-20713USmedium6.1—
CVE-2021-1518UShigh8.8—
CVE-2020-3529UShigh7.5—
CVE-2020-3533UShigh7.5—
CVE-2021-40117UShigh7.5—
CVE-2021-1495USmedium5.3—
CVE-2020-3555UShigh7.5—
CVE-2021-34749UShigh8.6—
CVE-2021-1504UShigh7.5—
CVE-2021-1445UShigh7.5—
CVE-2021-34783UShigh7.5—
CVE-2022-20760UShigh7.5—
CVE-2022-20745UShigh7.5—
CVE-2022-20685US——
CVE-2020-3528UShigh7.5—
CVE-2021-34781UShigh7.5—
CVE-2021-40118UShigh7.5—
CVE-2022-20751UShigh7.5—
CVE-2022-20715UShigh8.6—
CVE-2021-1501UShigh7.5—
CVE-2020-3564USmedium5.3—
CVE-2021-1573UShigh7.5—
CVE-2020-3561USmedium4.7—
CVE-2022-20757UShigh7.5—
CVE-2020-3578USmedium6.5OT elevated—
CVE-2021-1493UShigh7.1—
CVE-2021-1489USmedium6.5—
CVE-2020-3582USmedium6.1—
CVE-2020-3581USmedium6.1—
CVE-2021-34791USmedium5.3—
CVE-2021-34790USmedium5.3—
CVE-2021-1494US——
CVE-2020-3583USmedium6.1—
CVE-2021-34787USmedium5.3—
showing 50 of 119
02

weaknesses (8)

The flaw types (CWEs) most of these CVEs share.

  • CWE-20Improper Input Validation17 CVEs
  • CWE-400Uncontrolled Resource Consumption10 CVEs
  • CWE-401Missing Release of Memory after Effective Lifetime9 CVEs
  • CWE-284Improper Access Control7 CVEs
  • CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')7 CVEs
  • CWE-787Out-of-bounds Write7 CVEs
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')7 CVEs
  • CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer4 CVEs
03

sources (1)

Which sources assert this record, and when.

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