CVE-2020-3562
A vulnerability in the SSL/TLS inspection of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series firewalls could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation for certain fields of specific SSL/TLS messages. An attacker could exploit this vulnerability by sending a malformed SSL/TLS message through an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. No manual intervention is needed to recover the device after it has reloaded.
Published:Oct 21, 2020
Last Modified:Aug 11, 2026
EPS:Oct 21, 2020
EPSS Score:0.0181
CVSS Score:8.6
Affected Products
Vendor
Product
Action
Vendor
Cisco
Product
Firepower 2110
Cisco
Firepower 2110
Vendor
Cisco
Product
Firepower 2120
Cisco
Firepower 2120
Vendor
Cisco
Product
Firepower 2130
Cisco
Firepower 2130
Vendor
Cisco
Product
Firepower 2140
Cisco
Firepower 2140
Vendor
Cisco
Product
Secure Firewall Threat Defense
Cisco
Secure Firewall Threat Defense
Exploits
No exploit reference
Common Weakness Enumeration
Common Attack Pattern Enumeration and Classification (CAPEC)
Related CVEs
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
