CVE-2026-20349
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Summary
A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
This vulnerability is due to insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.1 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.1.28 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.2 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.2.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.2.7 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.2.11 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.2.13 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.2.14 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.3.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.3.14 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.1 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.3.15 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.1.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.2 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.3.19 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.3.23 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.2.5 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.2.7 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.9 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.2.8 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.14 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.5 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.9 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.3.39 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.19 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.12 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.3.46 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.27 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.18 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.3.53 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.3.55 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.38 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.39 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.3.56 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.1 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.42 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.22 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.1.5 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.5 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.24 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.48 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.8 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.2 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.27 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.55 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.22 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.2.10 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.57 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.28 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.24 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.2.21 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.61 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.31 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.29 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.2.22 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.62 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.34 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.67 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.70 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.40 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.1.1 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.71 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.3.4 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.47 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.3.7 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.37 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.76 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.3.9 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.38 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.50 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.1.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.3.10 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.1.2 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.52 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.3.13 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.1.6 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.53 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.82 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.2 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.3.16 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.19.1.42 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.57 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.84 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.3.20 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.2.4 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1.7 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.2.9 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1.13 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.7 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.2.13 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.66 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.10 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1.19 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.85 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.2.14 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.67 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.24.1 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.68 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1.22 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.14 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.2.20 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.71 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.19 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1.26 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.89 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.2.32 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.76 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.3 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.24.1.5 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.22 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.24.1.9 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.28 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.22.3.5 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.16.4.92 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.135 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1.195 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.30 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.24.1.155 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.23.1.32 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.24.1.11 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.34 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.82 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.18.4.90 | affected |
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software | 9.20.4.46 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.0 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.0.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.1.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.0 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.2.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.3 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.0.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.4 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.5 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.3.0 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.3 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.3.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.4 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.6 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.5 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.4.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.3.1.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.0 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.6.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.5.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.6 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.6.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.1.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.7 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.5.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.3.1.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.8 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.6.0 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.8.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.6.3 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.2.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.9 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.7 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.7.0 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.2.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.10 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.6.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.2.3 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.8 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.6.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.7.10 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.7.11 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.8.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.6.2.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.7.10.1 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.2.4 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.10.2 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.3 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.6.4 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 10.0.0 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.4 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.0.9 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.11 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.7 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.8 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.2.12 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.7.13 | affected |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 10.0.2 | affected |
Weaknesses
- CWE-244: Improper Clearing of Heap Memory Before Release ('Heap Inspection')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: active
- Automatable: yes
- Technical Impact: partial
Additional References
References
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