DoS Vulnerability in Cisco Secure Firewall ASA and FTD Software
CVE-2026-20014

7.7HIGH

Key Information:

Vendor

Cisco
Status
Cisco Secure Firewall Adaptive Security Appliance (asa) Software
Cisco Secure Firewall Threat Defense (ftd) Software
Vendor
CVE Published:
4 March 2026

Badges

👾 Exploit Exists

What is CVE-2026-20014?

A vulnerability exists in the IKEv2 functionality of Cisco Secure Firewall ASA and FTD software, enabling authenticated remote attackers with valid VPN credentials to send crafted IKEv2 packets. This could exploit weaknesses in IKEv2 packet handling, leading to memory exhaustion and potentially causing the affected device to reload. Such a denial-of-service condition could disrupt the availability of services for other devices in the network.

Affected Version(s)

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.1

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.1.3

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18.2

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
7.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.