CVE-2026-20025
Analyzed
Analyzed - Analysis Complete
Heap Corruption in Cisco ASA/FTD OSPF Causes DoS
Publication date: 2026-03-04
Last updated on: 2026-06-05
Assigner: Cisco Systems, Inc.
Description
Description
A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To exploit this vulnerability, the attacker must have the OSPF secret key.
This vulnerability is due to insufficient input validation when processing OSPF link-state update (LSU) packets. An attacker could exploit this vulnerability by sending crafted OSPF LSU packets. A successful exploit could allow the attacker to corrupt the heap, causing the device to reload, resulting in a DoS condition.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cisco | firepower_threat_defense_software | From 6.4.0 (inc) to 7.0.9 (exc) |
| cisco | firepower_threat_defense_software | From 7.1.0 (inc) to 7.2.11 (exc) |
| cisco | firepower_threat_defense_software | From 7.3.0 (inc) to 7.4.3 (exc) |
| cisco | firepower_threat_defense_software | From 7.6.0 (inc) to 7.6.4 (exc) |
| cisco | firepower_threat_defense_software | From 7.7.0 (inc) to 7.7.11 (exc) |
| cisco | adaptive_security_appliance_software | From 9.12.1 (inc) to 9.16.4.85 (exc) |
| cisco | adaptive_security_appliance_software | From 9.17.1 (inc) to 9.18.4.66 (exc) |
| cisco | adaptive_security_appliance_software | From 9.19.1 (inc) to 9.20.4 (exc) |
| cisco | adaptive_security_appliance_software | From 9.22.1.1 (inc) to 9.22.2.4 (exc) |
| cisco | adaptive_security_appliance_software | From 9.23.1 (inc) to 9.23.1.7 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-190 | The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number. |
