CVE-2026-20025
Heap Corruption in Cisco ASA/FTD OSPF Causes DoS
Publication date: 2026-03-04
Last updated on: 2026-03-04
Assigner: Cisco Systems, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cisco | secure_firewall_asa_software | * |
| cisco | secure_ftd_software | * |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the OSPF protocol implementation of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software. It arises from insufficient input validation when processing OSPF link-state update (LSU) packets.
An authenticated attacker who is adjacent in the network and has the OSPF secret key can exploit this by sending specially crafted OSPF LSU packets. This can corrupt the device's heap memory, causing the device to reload unexpectedly.
The result of this exploit is a denial-of-service (DoS) condition on the affected device.
How can this vulnerability impact me? :
This vulnerability can cause affected Cisco Secure Firewall ASA and FTD devices to reload unexpectedly, leading to a denial-of-service (DoS) condition.
Such unexpected reloads can disrupt network security and connectivity, potentially causing downtime and impacting the availability of critical network infrastructure.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
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How can this vulnerability be detected on my network or system? Can you suggest some commands?
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What immediate steps should I take to mitigate this vulnerability?
I don't know