Technology · Cisco
Cisco Firepower Threat Defense Software vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 33 vulnerabilities in Cisco Firepower Threat Defense Software: 0 in the last 7 days and 11 in the last 90 days, 8 of them critical and 3 exploited in the wild. The most recent, CVE-2026-20179, was published on 21 October 2026. 1 vulnerability in the last four weeks, down 90% on the four before (10). 0 critical against 4.
- Last 7 days
- 0
- Last 90 days
- 11
- Critical, all time
- 8
- Exploited in the wild
- 3
About Cisco Firepower Threat Defense Software
Cisco firewall and intrusion prevention system software for threat detection and defense.
Latest Cisco Firepower Threat Defense Software vulnerabilities
- CVE-2026-20179: Cisco Snort 3 GRE detection engine denial of servicemediumCVSS 5.8
- CVE-2026-20334: Cisco Secure Firewall improper adherence to coding standardshighCVSS 8.4EPSS 0.3%
- CVE-2026-20333: Cisco Secure Firewall ASA/FTD/FMC incorrect comparison in security contexthighCVSS 8.8EPSS 0.3%
- CVE-2026-20332: Cisco Secure Firewall ASA/FTD/FMC access control vulnerabilitycriticalCVSS 9.9EPSS 0.3%
- CVE-2026-20250: Cisco Secure Firewall ASA and FTD DTLS denial of servicehighCVSS 8.6EPSS 0.5%
- CVE-2026-20249: Cisco Secure Firewall IKEv2 certificate authentication denial of servicehighCVSS 8.6EPSS 0.4%
- CVE-2026-20222: Cisco Secure Firewall ASA and FTD EIGRP denial of servicehighCVSS 7.4EPSS 0.2%
- CVE-2026-20135: Cisco Secure Firewall Threat Defense TLS 1.3 denial of servicehighCVSS 8.6EPSS 0.5%
- CVE-2026-20330: Cisco Secure Firewall improper input validation in ASA, FTD, and FMCcriticalCVSS 9.9EPSS 0.3%
- CVE-2026-20329: Cisco Secure Firewall improper exception handling and input validationcriticalCVSS 9.9EPSS 0.4%
- CVE-2026-20331: Cisco Secure Firewall protection mechanism failurecriticalCVSS 9.6EPSS 0.2%
- CVE-2026-20349: Cisco Secure Firewall ASA and FTD denial of service in SSL VPNcriticalexploited in the wildCVSS 8.6EPSS 1.0%
- CVE-2026-20025: Cisco ASA and FTD Software heap corruption in OSPF protocolmediumCVSS 6.8EPSS 0.1%
- CVE-2026-20024: Cisco ASA and FTD Software heap corruption in OSPF protocolmediumCVSS 6.8EPSS 0.2%
- CVE-2026-20022: Cisco Secure Firewall ASA and FTD OSPF DoS via insufficient input validationmediumCVSS 6.1EPSS 0.2%
- CVE-2026-20021: Cisco Secure Firewall ASA and FTD OSPF protocol denial of servicemediumCVSS 4.3EPSS 0.2%
- CVE-2026-20020: Cisco Secure Firewall ASA and FTD OSPF buffer overflowmediumCVSS 6.8EPSS 0.3%
- CVE-2026-20102: Cisco Secure Firewall ASA SAML reflected XSSmediumCVSS 6.1EPSS 0.3%
- CVE-2026-20101: Cisco Secure Firewall ASA and FTD SAML 2.0 SSO denial of servicehighCVSS 8.6EPSS 0.4%
- CVE-2026-20100: Cisco Secure Firewall ASA and FTD Remote Access SSL VPN denial of servicehighCVSS 7.7EPSS 0.3%
- CVE-2026-20073: Cisco Secure Firewall ASA and FTD access control bypassmediumCVSS 5.8EPSS 0.4%
- CVE-2026-20070: Cisco Secure Firewall ASA and FTD cross-site scripting in VPN web servicesmediumCVSS 6.1EPSS 0.3%
- CVE-2026-20069: Cisco ASA and FTD Request Smuggling in VPN Web ServicesmediumCVSS 4.3EPSS 0.0%
- CVE-2026-20067: Cisco Snort 3 detection engine denial of servicemediumCVSS 5.8EPSS 0.4%
- CVE-2026-20058: Cisco Snort 3 VBA decompression denial of servicemediumCVSS 5.8EPSS 0.4%
Most severe Cisco Firepower Threat Defense Software vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2025-20333: Cisco ASA and FTD buffer overflow in VPN web servercriticalexploited in the wildCVSS 9.9EPSS 70.7%
- CVE-2026-20349: Cisco Secure Firewall ASA and FTD denial of service in SSL VPNcriticalexploited in the wildCVSS 8.6EPSS 1.0%
- CVE-2025-20362: Cisco Secure Firewall ASA and FTD missing authorization in VPN web servercriticalexploited in the wildCVSS 6.5EPSS 87.1%
- CVE-2026-20329: Cisco Secure Firewall improper exception handling and input validationcriticalCVSS 9.9EPSS 0.4%
- CVE-2026-20330: Cisco Secure Firewall improper input validation in ASA, FTD, and FMCcriticalCVSS 9.9EPSS 0.3%
- CVE-2026-20332: Cisco Secure Firewall ASA/FTD/FMC access control vulnerabilitycriticalCVSS 9.9EPSS 0.3%
- CVE-2026-20331: Cisco Secure Firewall protection mechanism failurecriticalCVSS 9.6EPSS 0.2%
- CVE-2025-20363: Cisco multiple platforms code execution in web servicescriticalCVSS 9EPSS 6.9%
- CVE-2026-20333: Cisco Secure Firewall ASA/FTD/FMC incorrect comparison in security contexthighCVSS 8.8EPSS 0.3%
- CVE-2026-20250: Cisco Secure Firewall ASA and FTD DTLS denial of servicehighCVSS 8.6EPSS 0.5%
Vulnerabilities per week
1 vulnerability in the last four weeks, down 90% on the four before (10). 0 critical against 4. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 10 | 4 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 1 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Cisco Firepower Threat Defense Software vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/firepower-threat-defense-software)<a href="https://junglewise.ai/threats/technologies/firepower-threat-defense-software"><img src="https://junglewise.ai/threats/technologies/firepower-threat-defense-software/badge.svg" alt="Cisco Firepower Threat Defense Software vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/firepower-threat-defense-software.json, and this page as text at https://junglewise.ai/threats/technologies/firepower-threat-defense-software.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Cisco Firepower Threat Defense Software vulnerabilities", https://junglewise.ai/threats/technologies/firepower-threat-defense-software, 11 November 2026.