CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2021-40117
High (7.5) in cisco. EPSS 1.7% chance of exploitation in the next 30 days.
A vulnerability in SSL/TLS message handler for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because incoming SSL/TLS packets are not properly processed. An attacker could exploit this vulnerability by sending a crafted SSL/TLS packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
Severity
- EPSS
- 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-400, CWE-119
- Published
- Modified
- Record from
- the NVD, synced
Affected
- cisco:adaptive_security_appliance
- cisco:adaptive_security_appliance_software
- cisco:asa_5505_firmware
- cisco:asa_5512-x_firmware
- cisco:asa_5515-x_firmware
- cisco:asa_5525-x_firmware
- cisco:asa_5545-x_firmware
- cisco:asa_5555-x_firmware
- cisco:asa_5580_firmware
- cisco:asa_5585-x_firmware
- cisco:secure_firewall_threat_defense