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CVE-2026-20349

Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Cisco / Cisco Secure Firewall Adaptive Security Appliance (ASA) Softwareaffected 9.16.1; affected 9.16.1.28; affected 9.16.2; affected 9.16.2.3; affected 9.16.2.7; affected 9.16.2.11; affected 9.16.2.13; affected 9.16.2.14; affected 9.16.3.3; affected 9.16.3; affected 9.16.3.14; affected 9.18.1; affected 9.16.3.15; affected 9.18.1.3; affected 9.18.2; affected 9.16.3.19; affected 9.16.3.23; affected 9.18.2.5; affected 9.16.4; affected 9.18.2.7; affected 9.19.1; affected 9.16.4.9; affected 9.18.2.8; affected 9.16.4.14; affected 9.18.3; affected 9.19.1.5; affected 9.16.4.18; affected 9.19.1.9; affected 9.18.3.39; affected 9.16.4.19; affected 9.19.1.12; affected 9.18.3.46; affected 9.16.4.27; affected 9.19.1.18; affected 9.18.3.53; affected 9.18.3.55; affected 9.16.4.38; affected 9.16.4.39; affected 9.18.3.56; affected 9.20.1; affected 9.16.4.42; affected 9.19.1.22; affected 9.18.4; affected 9.20.1.5; affected 9.18.4.5; affected 9.19.1.24; affected 9.16.4.48; affected 9.18.4.8; affected 9.20.2; affected 9.19.1.27; affected 9.16.4.55; affected 9.18.4.22; affected 9.20.2.10; affected 9.16.4.57; affected 9.19.1.28; affected 9.18.4.24; affected 9.20.2.21; affected 9.16.4.61; affected 9.19.1.31; affected 9.18.4.29; affected 9.20.2.22; affected 9.16.4.62; affected 9.18.4.34; affected 9.20.3; affected 9.16.4.67; affected 9.16.4.70; affected 9.18.4.40; affected 9.23.1; affected 9.22.1.1; affected 9.16.4.71; affected 9.20.3.4; affected 9.18.4.47; affected 9.20.3.7; affected 9.19.1.37; affected 9.16.4.76; affected 9.20.3.9; affected 9.19.1.38; affected 9.18.4.50; affected 9.22.1.3; affected 9.20.3.10; affected 9.22.1.2; affected 9.18.4.52; affected 9.20.3.13; affected 9.22.1.6; affected 9.18.4.53; affected 9.16.4.82; affected 9.22.2; affected 9.20.3.16; affected 9.19.1.42; affected 9.18.4.57; affected 9.16.4.84; affected 9.23.1.3; affected 9.20.3.20; affected 9.22.2.4; affected 9.23.1.7; affected 9.20.4; affected 9.22.2.9; affected 9.23.1.13; affected 9.20.4.7; affected 9.22.2.13; affected 9.18.4.66; affected 9.20.4.10; affected 9.23.1.19; affected 9.16.4.85; affected 9.22.2.14; affected 9.18.4.67; affected 9.24.1; affected 9.18.4.68; affected 9.23.1.22; affected 9.20.4.14; affected 9.22.2.20; affected 9.18.4.71; affected 9.20.4.19; affected 9.23.1.26; affected 9.16.4.89; affected 9.22.2.32; affected 9.18.4.76; affected 9.22.3; affected 9.24.1.5; affected 9.20.4.22; affected 9.24.1.9; affected 9.20.4.28; affected 9.22.3.5; affected 9.16.4.92; affected 9.18.4.135; affected 9.23.1.195; affected 9.20.4.30; affected 9.24.1.155; affected 9.23.1.32; affected 9.24.1.11; affected 9.20.4.34; affected 9.18.4.82
Cisco / Cisco Secure Firewall Threat Defense (FTD) Softwareaffected 7.0.0; affected 7.0.0.1; affected 7.0.1; affected 7.0.1.1; affected 7.0.2; affected 7.2.0; affected 7.0.2.1; affected 7.0.3; affected 7.2.0.1; affected 7.0.4; affected 7.2.1; affected 7.0.5; affected 7.3.0; affected 7.2.2; affected 7.2.3; affected 7.3.1; affected 7.2.4; affected 7.0.6; affected 7.2.5; affected 7.2.4.1; affected 7.3.1.1; affected 7.4.0; affected 7.0.6.1; affected 7.2.5.1; affected 7.4.1; affected 7.2.6; affected 7.0.6.2; affected 7.4.1.1; affected 7.2.7; affected 7.2.5.2; affected 7.3.1.2; affected 7.2.8; affected 7.6.0; affected 7.4.2; affected 7.2.8.1; affected 7.0.6.3; affected 7.4.2.1; affected 7.2.9; affected 7.0.7; affected 7.7.0; affected 7.4.2.2; affected 7.2.10; affected 7.6.1; affected 7.4.2.3; affected 7.0.8; affected 7.6.2; affected 7.7.10; affected 7.7.11; affected 7.0.8.1; affected 7.6.2.1; affected 7.7.10.1; affected 7.4.2.4; affected 7.2.10.2; affected 7.4.3; affected 7.6.4; affected 10.0.0; affected 7.4.4; affected 7.0.9; affected 7.2.11; affected 7.4.7; affected 10.0.2

CWE

CWE-244

References

ADP enrichment

CISA-ADP

No English description supplied.