Resource exhaustion in Cisco Secure Firewall Adaptive Security Appliance (Asa) Software
CVE-2026-20103
A vulnerability in the Remote Access SSL VPN functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to exhaust dev…
EPSS: 0.001 (19.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Secure Firewall Adaptive Security Appliance (Asa) Software — versions 9.12.4.48, 9.12.4.50, 9.12.4.52
- Cisco Secure Firewall Threat Defense (Ftd) Software — versions 6.4.0.16, 6.4.0.17, 6.4.0.18
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20103?
- CVE-2026-20103 is a high-severity vulnerability in Cisco Secure Firewall Adaptive Security Appliance (Asa) Software, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 8.6/10. Published 2026-03-04.
- How severe is CVE-2026-20103?
- High severity. CVSS v3 base score is 8.6 out of 10.