CVE-2026-20021
MEDIUM EPSS 11.5%
Published Mar 4, 20263mo ago · Modified Apr 16, 20262mo ago
4.3 CVSS 3.1
Published Mar 4, 2026 3mo ago
Last Modified Apr 16, 2026 2mo ago
Description
A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low
Threat Intelligence
EPSS Exploit Probability
11.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-401
Affected Products 84
| Vendor | Product | Version | Range |
|---|---|---|---|
| cisco | adaptive_security_appliance_software | * | ≥9.12.1 – ≤9.12.4.67 |
| cisco | adaptive_security_appliance_software | * | ≥9.16.1 – ≤9.16.4.85 |
| cisco | adaptive_security_appliance_software | * | ≥9.17.1 – ≤9.17.1.46 |
| cisco | adaptive_security_appliance_software | * | ≥9.18.1 – ≤9.18.4.68 |
| cisco | adaptive_security_appliance_software | * | ≥9.19.1 – ≤9.19.1.42 |
| cisco | adaptive_security_appliance_software | * | ≥9.20.1 – ≤9.20.4.14 |
| cisco | adaptive_security_appliance_software | * | ≥9.22.1.1 – ≤9.22.2.14 |
| cisco | adaptive_security_appliance_software | * | ≥9.23.1 – ≤9.23.1.22 |
| cisco | firepower_threat_defense_software | 6.4.0 | any |
| cisco | firepower_threat_defense_software | 6.4.0.1 | any |
| cisco | firepower_threat_defense_software | 6.4.0.2 | any |
| cisco | firepower_threat_defense_software | 6.4.0.3 | any |
| cisco | firepower_threat_defense_software | 6.4.0.4 | any |
| cisco | firepower_threat_defense_software | 6.4.0.5 | any |
| cisco | firepower_threat_defense_software | 6.4.0.6 | any |
| cisco | firepower_threat_defense_software | 6.4.0.7 | any |
| cisco | firepower_threat_defense_software | 6.4.0.8 | any |
| cisco | firepower_threat_defense_software | 6.4.0.9 | any |
| cisco | firepower_threat_defense_software | 6.4.0.10 | any |
| cisco | firepower_threat_defense_software | 6.4.0.11 | any |
| cisco | firepower_threat_defense_software | 6.4.0.12 | any |
| cisco | firepower_threat_defense_software | 6.4.0.13 | any |
| cisco | firepower_threat_defense_software | 6.4.0.14 | any |
| cisco | firepower_threat_defense_software | 6.4.0.15 | any |
| cisco | firepower_threat_defense_software | 6.4.0.16 | any |
| cisco | firepower_threat_defense_software | 6.4.0.17 | any |
| cisco | firepower_threat_defense_software | 6.4.0.18 | any |
| cisco | firepower_threat_defense_software | 7.0.0 | any |
| cisco | firepower_threat_defense_software | 7.0.0.1 | any |
| cisco | firepower_threat_defense_software | 7.0.1 | any |
| cisco | firepower_threat_defense_software | 7.0.1.1 | any |
| cisco | firepower_threat_defense_software | 7.0.2 | any |
| cisco | firepower_threat_defense_software | 7.0.2.1 | any |
| cisco | firepower_threat_defense_software | 7.0.3 | any |
| cisco | firepower_threat_defense_software | 7.0.4 | any |
| cisco | firepower_threat_defense_software | 7.0.5 | any |
| cisco | firepower_threat_defense_software | 7.0.6 | any |
| cisco | firepower_threat_defense_software | 7.0.6.1 | any |
| cisco | firepower_threat_defense_software | 7.0.6.2 | any |
| cisco | firepower_threat_defense_software | 7.0.6.3 | any |
| cisco | firepower_threat_defense_software | 7.0.7 | any |
| cisco | firepower_threat_defense_software | 7.0.8 | any |
| cisco | firepower_threat_defense_software | 7.0.8.1 | any |
| cisco | firepower_threat_defense_software | 7.1.0 | any |
| cisco | firepower_threat_defense_software | 7.1.0.1 | any |
| cisco | firepower_threat_defense_software | 7.1.0.2 | any |
| cisco | firepower_threat_defense_software | 7.1.0.3 | any |
| cisco | firepower_threat_defense_software | 7.2.0 | any |
| cisco | firepower_threat_defense_software | 7.2.0.1 | any |
| cisco | firepower_threat_defense_software | 7.2.1 | any |
| cisco | firepower_threat_defense_software | 7.2.2 | any |
| cisco | firepower_threat_defense_software | 7.2.3 | any |
| cisco | firepower_threat_defense_software | 7.2.4 | any |
| cisco | firepower_threat_defense_software | 7.2.4.1 | any |
| cisco | firepower_threat_defense_software | 7.2.5 | any |
| cisco | firepower_threat_defense_software | 7.2.5.1 | any |
| cisco | firepower_threat_defense_software | 7.2.5.2 | any |
| cisco | firepower_threat_defense_software | 7.2.6 | any |
| cisco | firepower_threat_defense_software | 7.2.7 | any |
| cisco | firepower_threat_defense_software | 7.2.8 | any |
| cisco | firepower_threat_defense_software | 7.2.8.1 | any |
| cisco | firepower_threat_defense_software | 7.2.9 | any |
| cisco | firepower_threat_defense_software | 7.2.10 | any |
| cisco | firepower_threat_defense_software | 7.2.10.2 | any |
| cisco | firepower_threat_defense_software | 7.3.0 | any |
| cisco | firepower_threat_defense_software | 7.3.1 | any |
| cisco | firepower_threat_defense_software | 7.3.1.1 | any |
| cisco | firepower_threat_defense_software | 7.3.1.2 | any |
| cisco | firepower_threat_defense_software | 7.4.0 | any |
| cisco | firepower_threat_defense_software | 7.4.1 | any |
| cisco | firepower_threat_defense_software | 7.4.1.1 | any |
| cisco | firepower_threat_defense_software | 7.4.2 | any |
| cisco | firepower_threat_defense_software | 7.4.2.1 | any |
| cisco | firepower_threat_defense_software | 7.4.2.2 | any |
| cisco | firepower_threat_defense_software | 7.4.2.3 | any |
| cisco | firepower_threat_defense_software | 7.4.2.4 | any |
| cisco | firepower_threat_defense_software | 7.4.3 | any |
| cisco | firepower_threat_defense_software | 7.6.0 | any |
| cisco | firepower_threat_defense_software | 7.6.1 | any |
| cisco | firepower_threat_defense_software | 7.6.2 | any |
| cisco | firepower_threat_defense_software | 7.6.2.1 | any |
| cisco | firepower_threat_defense_software | 7.7.0 | any |
| cisco | firepower_threat_defense_software | 7.7.10 | any |
| cisco | firepower_threat_defense_software | 7.7.10.1 | any |
References 1
- sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.