CVE-2026-20024
Received
Received - Intake
Heap Corruption in Cisco OSPF Causes DoS via Device Reload
Publication date: 2026-03-04
Last updated on: 2026-05-04
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 heap corruption in OSPF when parsing packets. An attacker could exploit this vulnerability by sending crafted packets to the OSPF service. A successful exploit could allow the attacker to corrupt the heap, causing the affected 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 | adaptive_security_appliance_software | 9.16.1 |
| cisco | adaptive_security_appliance_software | 9.12.2 |
| cisco | adaptive_security_appliance_software | 9.12.2.5 |
| cisco | adaptive_security_appliance_software | 9.12.4.4 |
| cisco | adaptive_security_appliance_software | 9.12.3.2 |
| cisco | adaptive_security_appliance_software | 9.12.3.7 |
| cisco | adaptive_security_appliance_software | 9.12.4 |
| cisco | adaptive_security_appliance_software | 9.12.3.12 |
| cisco | adaptive_security_appliance_software | 9.12.4.37 |
| cisco | adaptive_security_appliance_software | 9.12.4.38 |
| cisco | adaptive_security_appliance_software | 9.12.4.39 |
| cisco | adaptive_security_appliance_software | 9.17.1 |
| cisco | adaptive_security_appliance_software | 9.12.3 |
| cisco | adaptive_security_appliance_software | 9.12.3.9 |
| cisco | adaptive_security_appliance_software | 9.12.4.26 |
| cisco | adaptive_security_appliance_software | 9.12.4.30 |
| cisco | adaptive_security_appliance_software | 9.16.1.28 |
| cisco | adaptive_security_appliance_software | 9.17.1.7 |
| cisco | adaptive_security_appliance_software | 9.16.3.14 |
| cisco | adaptive_security_appliance_software | 9.16.4 |
| cisco | adaptive_security_appliance_software | 9.18.2.5 |
| cisco | adaptive_security_appliance_software | 9.17.1.10 |
| cisco | adaptive_security_appliance_software | 9.17.1.13 |
| cisco | adaptive_security_appliance_software | 9.18.1 |
| cisco | adaptive_security_appliance_software | 9.18.1.3 |
| cisco | adaptive_security_appliance_software | 9.12.1.2 |
| cisco | adaptive_security_appliance_software | 9.12.1.3 |
| cisco | adaptive_security_appliance_software | 9.12.4.10 |
| cisco | adaptive_security_appliance_software | 9.12.4.13 |
| cisco | adaptive_security_appliance_software | 9.12.4.8 |
| cisco | adaptive_security_appliance_software | 9.12.4.18 |
| cisco | adaptive_security_appliance_software | 9.16.2.3 |
| cisco | adaptive_security_appliance_software | 9.16.2.7 |
| cisco | adaptive_security_appliance_software | 9.16.2.11 |
| cisco | adaptive_security_appliance_software | 9.16.2.13 |
| cisco | adaptive_security_appliance_software | 9.16.2.14 |
| cisco | adaptive_security_appliance_software | 9.17.1.11 |
| cisco | adaptive_security_appliance_software | 9.17.1.15 |
| cisco | adaptive_security_appliance_software | 9.12.4.2 |
| cisco | adaptive_security_appliance_software | 9.17.1.9 |
| cisco | adaptive_security_appliance_software | 9.12.2.4 |
| cisco | adaptive_security_appliance_software | 9.12.2.9 |
| cisco | adaptive_security_appliance_software | 9.12.2.1 |
| cisco | adaptive_security_appliance_software | 9.12.4.7 |
| cisco | adaptive_security_appliance_software | 9.12.4.24 |
| cisco | adaptive_security_appliance_software | 9.12.4.29 |
| cisco | adaptive_security_appliance_software | 9.12.4.35 |
| cisco | adaptive_security_appliance_software | 9.16.2 |
| cisco | adaptive_security_appliance_software | 9.16.3.3 |
| cisco | adaptive_security_appliance_software | 9.16.3 |
| cisco | adaptive_security_appliance_software | 9.18.2 |
| cisco | adaptive_security_appliance_software | 9.19.1.9 |
| cisco | adaptive_security_appliance_software | 9.19.1.5 |
| cisco | adaptive_security_appliance_software | 9.19.1.18 |
| cisco | adaptive_security_appliance_software | 9.19.1.12 |
| cisco | adaptive_security_appliance_software | 9.19.1 |
| cisco | adaptive_security_appliance_software | 9.18.3.55 |
| cisco | adaptive_security_appliance_software | 9.18.3.53 |
| cisco | adaptive_security_appliance_software | 9.18.3.46 |
| cisco | adaptive_security_appliance_software | 9.18.3.39 |
| cisco | adaptive_security_appliance_software | 9.18.3 |
| cisco | adaptive_security_appliance_software | 9.18.2.8 |
| cisco | adaptive_security_appliance_software | 9.18.2.7 |
| cisco | adaptive_security_appliance_software | 9.17.1.30 |
| cisco | adaptive_security_appliance_software | 9.17.1.20 |
| cisco | adaptive_security_appliance_software | 9.16.4.9 |
| cisco | adaptive_security_appliance_software | 9.16.4.38 |
| cisco | adaptive_security_appliance_software | 9.16.4.27 |
| cisco | adaptive_security_appliance_software | 9.16.4.19 |
| cisco | adaptive_security_appliance_software | 9.16.4.14 |
| cisco | adaptive_security_appliance_software | 9.16.3.23 |
| cisco | adaptive_security_appliance_software | 9.16.3.19 |
| cisco | adaptive_security_appliance_software | 9.16.3.15 |
| cisco | adaptive_security_appliance_software | 9.12.4.58 |
| cisco | adaptive_security_appliance_software | 9.12.4.56 |
| cisco | adaptive_security_appliance_software | 9.12.4.55 |
| cisco | adaptive_security_appliance_software | 9.12.4.54 |
| cisco | adaptive_security_appliance_software | 9.12.4.52 |
| cisco | adaptive_security_appliance_software | 9.12.4.50 |
| cisco | adaptive_security_appliance_software | 9.12.4.48 |
| cisco | adaptive_security_appliance_software | 9.12.4.47 |
| cisco | adaptive_security_appliance_software | 9.12.4.41 |
| cisco | adaptive_security_appliance_software | 9.12.4.40 |
| cisco | adaptive_security_appliance_software | 9.12.4.62 |
| cisco | adaptive_security_appliance_software | 9.12.4.65 |
| cisco | adaptive_security_appliance_software | 9.16.4.39 |
| cisco | adaptive_security_appliance_software | 9.16.4.42 |
| cisco | adaptive_security_appliance_software | 9.16.4.48 |
| cisco | adaptive_security_appliance_software | 9.16.4.55 |
| cisco | adaptive_security_appliance_software | 9.17.1.33 |
| cisco | adaptive_security_appliance_software | 9.18.3.56 |
| cisco | adaptive_security_appliance_software | 9.18.4 |
| cisco | adaptive_security_appliance_software | 9.18.4.5 |
| cisco | adaptive_security_appliance_software | 9.18.4.8 |
| cisco | adaptive_security_appliance_software | 9.19.1.22 |
| cisco | adaptive_security_appliance_software | 9.19.1.24 |
| cisco | adaptive_security_appliance_software | 9.19.1.27 |
| cisco | adaptive_security_appliance_software | 9.20.1 |
| cisco | adaptive_security_appliance_software | 9.20.1.5 |
| cisco | adaptive_security_appliance_software | 9.20.2 |
| cisco | adaptive_security_appliance_software | 9.20.2.21 |
| cisco | adaptive_security_appliance_software | 9.20.2.10 |
| cisco | adaptive_security_appliance_software | 9.19.1.31 |
| cisco | adaptive_security_appliance_software | 9.19.1.28 |
| cisco | adaptive_security_appliance_software | 9.18.4.24 |
| cisco | adaptive_security_appliance_software | 9.18.4.22 |
| cisco | adaptive_security_appliance_software | 9.17.1.39 |
| cisco | adaptive_security_appliance_software | 9.16.4.61 |
| cisco | adaptive_security_appliance_software | 9.16.4.57 |
| cisco | adaptive_security_appliance_software | 9.12.4.67 |
| cisco | adaptive_security_appliance_software | 9.20.3 |
| cisco | adaptive_security_appliance_software | 9.18.4.40 |
| cisco | adaptive_security_appliance_software | 9.16.4.70 |
| cisco | adaptive_security_appliance_software | 9.16.4.67 |
| cisco | adaptive_security_appliance_software | 9.20.2.22 |
| cisco | adaptive_security_appliance_software | 9.18.4.34 |
| cisco | adaptive_security_appliance_software | 9.18.4.29 |
| cisco | adaptive_security_appliance_software | 9.16.4.62 |
| cisco | adaptive_security_appliance_software | 9.20.3.4 |
| cisco | adaptive_security_appliance_software | 9.20.3.7 |
| cisco | adaptive_security_appliance_software | 9.22.1.1 |
| cisco | adaptive_security_appliance_software | 9.23.1 |
| cisco | adaptive_security_appliance_software | 9.16.4.71 |
| cisco | adaptive_security_appliance_software | 9.16.4.76 |
| cisco | adaptive_security_appliance_software | 9.16.4.82 |
| cisco | adaptive_security_appliance_software | 9.17.1.45 |
| cisco | adaptive_security_appliance_software | 9.17.1.46 |
| cisco | adaptive_security_appliance_software | 9.18.4.47 |
| cisco | adaptive_security_appliance_software | 9.18.4.50 |
| cisco | adaptive_security_appliance_software | 9.18.4.52 |
| cisco | adaptive_security_appliance_software | 9.18.4.53 |
| cisco | adaptive_security_appliance_software | 9.19.1.37 |
| cisco | adaptive_security_appliance_software | 9.19.1.38 |
| cisco | adaptive_security_appliance_software | 9.20.3.10 |
| cisco | adaptive_security_appliance_software | 9.20.3.13 |
| cisco | adaptive_security_appliance_software | 9.20.3.16 |
| cisco | adaptive_security_appliance_software | 9.20.3.9 |
| cisco | adaptive_security_appliance_software | 9.22.1.2 |
| cisco | adaptive_security_appliance_software | 9.22.1.3 |
| cisco | adaptive_security_appliance_software | 9.22.1.6 |
| cisco | adaptive_security_appliance_software | -9.12.1 |
| cisco | firepower_threat_defense_software | 6.4.0 |
| cisco | firepower_threat_defense_software | 6.4.0.1 |
| cisco | firepower_threat_defense_software | 6.4.0.3 |
| cisco | firepower_threat_defense_software | 6.4.0.2 |
| cisco | firepower_threat_defense_software | 6.4.0.4 |
| cisco | firepower_threat_defense_software | 6.4.0.5 |
| cisco | firepower_threat_defense_software | 6.4.0.6 |
| cisco | firepower_threat_defense_software | 6.4.0.7 |
| cisco | firepower_threat_defense_software | 6.4.0.8 |
| cisco | firepower_threat_defense_software | 6.4.0.9 |
| cisco | firepower_threat_defense_software | 6.4.0.10 |
| cisco | firepower_threat_defense_software | 6.4.0.11 |
| cisco | firepower_threat_defense_software | 6.4.0.12 |
| cisco | firepower_threat_defense_software | 6.4.0.13 |
| cisco | firepower_threat_defense_software | 6.4.0.14 |
| cisco | firepower_threat_defense_software | 6.4.0.15 |
| cisco | firepower_threat_defense_software | 6.4.0.16 |
| cisco | firepower_threat_defense_software | 6.4.0.17 |
| cisco | firepower_threat_defense_software | 7.0.0 |
| cisco | firepower_threat_defense_software | 7.0.0.1 |
| cisco | firepower_threat_defense_software | 7.0.1 |
| cisco | firepower_threat_defense_software | 7.0.1.1 |
| cisco | firepower_threat_defense_software | 7.0.2 |
| cisco | firepower_threat_defense_software | 7.0.2.1 |
| cisco | firepower_threat_defense_software | 7.0.3 |
| cisco | firepower_threat_defense_software | 7.0.4 |
| cisco | firepower_threat_defense_software | 7.0.5 |
| cisco | firepower_threat_defense_software | 7.0.6 |
| cisco | firepower_threat_defense_software | 7.0.6.1 |
| cisco | firepower_threat_defense_software | 7.1.0 |
| cisco | firepower_threat_defense_software | 7.1.0.1 |
| cisco | firepower_threat_defense_software | 7.1.0.2 |
| cisco | firepower_threat_defense_software | 7.1.0.3 |
| cisco | firepower_threat_defense_software | 7.2.0 |
| cisco | firepower_threat_defense_software | 7.2.0.1 |
| cisco | firepower_threat_defense_software | 7.2.1 |
| cisco | firepower_threat_defense_software | 7.2.2 |
| cisco | firepower_threat_defense_software | 7.2.3 |
| cisco | firepower_threat_defense_software | 7.2.4 |
| cisco | firepower_threat_defense_software | 7.2.4.1 |
| cisco | firepower_threat_defense_software | 7.2.5 |
| cisco | firepower_threat_defense_software | 7.2.5.1 |
| cisco | firepower_threat_defense_software | 7.3.0 |
| cisco | firepower_threat_defense_software | 7.3.1 |
| cisco | firepower_threat_defense_software | 7.3.1.1 |
| cisco | firepower_threat_defense_software | 7.4.0 |
| cisco | firepower_threat_defense_software | 7.4.1 |
| cisco | firepower_threat_defense_software | 7.4.1.1 |
| cisco | firepower_threat_defense_software | 7.3.1.2 |
| cisco | firepower_threat_defense_software | 7.2.8.1 |
| cisco | firepower_threat_defense_software | 7.2.8 |
| cisco | firepower_threat_defense_software | 7.2.5.2 |
| cisco | firepower_threat_defense_software | 7.2.7 |
| cisco | firepower_threat_defense_software | 7.2.6 |
| cisco | firepower_threat_defense_software | 7.0.6.2 |
| cisco | firepower_threat_defense_software | 6.4.0.18 |
| cisco | firepower_threat_defense_software | 7.4.2 |
| cisco | firepower_threat_defense_software | 7.0.6.3 |
| cisco | firepower_threat_defense_software | 7.0.7 |
| cisco | firepower_threat_defense_software | 7.0.8 |
| cisco | firepower_threat_defense_software | 7.0.8.1 |
| cisco | firepower_threat_defense_software | 7.2.9 |
| cisco | firepower_threat_defense_software | 7.4.2.1 |
| cisco | firepower_threat_defense_software | 7.4.2.2 |
| cisco | firepower_threat_defense_software | 7.4.2.3 |
| cisco | firepower_threat_defense_software | 7.4.2.4 |
| cisco | firepower_threat_defense_software | 7.6.0 |
| cisco | firepower_threat_defense_software | 7.7.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
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 is caused by heap corruption when parsing OSPF packets. An authenticated attacker who is adjacent to the device and has the OSPF secret key can send specially crafted packets to the OSPF service, which can corrupt the heap and cause the affected device to reload unexpectedly.
How can this vulnerability impact me? :
The primary impact of this vulnerability is a denial-of-service (DoS) condition. An attacker exploiting this flaw can cause the affected device to reload unexpectedly, disrupting network operations and potentially causing downtime.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know
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