CVE-2026-20024 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Cisco Secure Firewall Adaptive Security Appliance Software

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory BufferCWE-190 — Integer Overflow or WraparoundCWE-20 — Improper Input ValidationCWE-401 — Missing Release of Memory after Effective LifetimeCWE-787 — Out-of-bounds WriteCWE-823 — Use of Out-of-range Pointer Offset4 documents4 sources
Severity
6.8MEDIUMNVD
EPSS
0.0%
top 98.57%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Cisco Secure Firewall Adaptive Security Appliance SoftwareCisco Secure Firewall Threat Defense Software
Timeline
PublishedMar 4

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 c…

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:HExploitability: 2.3 | Impact: 4.0

Affected Packages2 packages

🔴Vulnerability Details

2
GHSA
GHSA-f3vw-6vxw-fwf4: A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attack↗2026-03-04
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CVEList
CVE-2026-20024: A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attack↗2026-03-04
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📋Vendor Advisories

1
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software OSPF Protocol Vulnerabilities↗2026-03-04
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CVE-2026-20024 — Cisco vulnerability | cvebase