CVE-2026-20039
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Cisco Adaptive Security Appliance and Firepower Threat Defense Software SSL VPN Authentication Denial of Service Vulnerability
A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to ineffective memory management of the VPN web server. An attacker could exploit this vulnerability by sending a large number of crafted HTTP requests to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Vendor
- Cisco
- Product
- Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
- Platforms
- Unknown
- Default status
unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 9.12.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.3.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.3.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.2.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.3.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.1.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.2.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.1.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.2.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.3.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.2.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.24 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.26 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.1.28 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.29 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.30 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.2.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.35 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.2.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.37 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.2.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.2.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.39 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.38 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.2.14 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.40 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.3.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.3.14 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.41 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.47 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.3.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.1.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.48 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.3.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.50 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.52 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.3.23 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.2.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.54 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.20 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.2.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.55 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.2.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.14 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.56 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.30 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.3.39 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.58 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.3.46 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.27 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.3.53 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.3.55 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.38 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.33 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.62 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.39 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.3.56 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.42 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.22 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.1.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.24 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.48 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.27 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.65 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.55 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.22 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.2.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.57 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.28 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.39 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.12.4.67 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.24 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.2.21 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.61 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.31 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.29 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.2.22 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.62 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.34 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.67 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.70 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.40 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.23.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.22.1.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.71 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.3.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.47 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.3.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.45 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.37 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.17.1.46 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.76 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.3.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.38 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.50 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.22.1.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.3.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.22.1.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.52 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.20.3.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.22.1.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.18.4.53 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.16.4.82 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.22.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 9.19.1.42 | affected | Unavailable | Unavailable | Unavailable | None listed |
Cisco Secure Firewall Threat Defense (FTD) Software
- Vendor
- Cisco
- Product
- Cisco Secure Firewall Threat Defense (FTD) Software
- Platforms
- Unknown
- Default status
unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.4.0.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.0.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.1.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.1.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.14 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.1.0.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.2.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.1.0.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.0.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.16 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.3.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.3.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.1.0.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.4.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.3.1.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.4.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.17 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.6.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.5.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.4.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.6.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.4.1.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 6.4.0.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.5.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.3.1.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.6.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.4.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.8.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.6.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.4.2.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.2.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.7 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.7.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.4.2.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.4.2.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.0.8.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 7.4.2.4 | affected | Unavailable | Unavailable | Unavailable | None listed |