4.3

CVE-2026-20021

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.
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HerstellerCisco
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Produkt Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
Version 9.12.1
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Version 9.12.1.2
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Version 9.12.1.3
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Version 9.12.2
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Version 9.12.2.4
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Version 9.12.2.5
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Version 9.12.2.9
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Version 9.12.3
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Version 9.12.3.2
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Version 9.12.3.7
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Version 9.12.4
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Version 9.12.3.12
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Version 9.12.3.9
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Version 9.12.2.1
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Version 9.12.4.2
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Version 9.12.4.4
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Version 9.12.4.7
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Version 9.12.4.10
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Version 9.12.4.13
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Version 9.12.4.8
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Version 9.12.4.18
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Version 9.12.4.24
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Version 9.12.4.26
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Version 9.12.4.29
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Version 9.12.4.30
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Version 9.12.4.35
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Version 9.12.4.37
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Version 9.12.4.38
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Version 9.12.4.39
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Version 9.12.4.40
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Version 9.12.4.41
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Version 9.12.4.47
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Version 9.12.4.48
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Version 9.12.4.50
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Version 9.12.4.52
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Version 9.12.4.54
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Version 9.12.4.55
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Version 9.12.4.58
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Version 9.12.4.62
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Version 9.12.4.65
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Version 9.12.4.67
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Version 9.16.1
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Version 9.16.1.28
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Version 9.16.2
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Version 9.16.2.3
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Version 9.16.2.7
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Version 9.16.2.11
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Version 9.16.2.13
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Version 9.16.2.14
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Version 9.16.3
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Version 9.16.3.3
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Version 9.16.3.15
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Version 9.16.3.19
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Version 9.16.3.23
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Version 9.16.4
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Version 9.16.4.9
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Version 9.16.4.14
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Version 9.16.4.19
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Version 9.16.4.27
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Version 9.16.4.38
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Version 9.16.4.39
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Version 9.16.4.42
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Version 9.16.4.48
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Version 9.16.4.55
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Version 9.16.4.57
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Version 9.16.4.61
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Version 9.16.4.62
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Version 9.16.4.67
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Version 9.16.4.70
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Version 9.16.4.82
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Version 9.16.4.84
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Version 9.16.4.85
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Version 9.17.1
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Version 9.17.1.7
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Version 9.17.1.9
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Version 9.17.1.10
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Version 9.17.1.11
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Version 9.17.1.13
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Version 9.17.1.15
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Version 9.17.1.20
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Version 9.17.1.30
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Version 9.17.1.33
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Version 9.17.1.39
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Version 9.17.1.45
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Version 9.17.1.46
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Version 9.18.1
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Version 9.18.1.3
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Version 9.18.2
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Version 9.18.2.5
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Version 9.18.2.7
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Version 9.18.2.8
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Version 9.18.3
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Version 9.18.3.39
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Version 9.18.3.46
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Version 9.18.3.53
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Version 9.18.3.55
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Version 9.18.4
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Version 9.18.4.5
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Version 9.18.4.8
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Version 9.18.4.22
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Version 9.18.4.24
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Version 9.18.4.29
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Version 9.18.4.34
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Version 9.18.4.40
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Version 9.18.4.47
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Version 9.18.4.50
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Version 9.18.4.52
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Version 9.18.4.53
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Version 9.18.4.57
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Version 9.18.4.66
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Version 9.18.4.67
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Version 9.18.4.68
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Version 9.19.1
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Version 9.19.1.5
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Version 9.19.1.9
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Version 9.19.1.12
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Version 9.19.1.18
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Version 9.19.1.22
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Version 9.19.1.24
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Version 9.19.1.27
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Version 9.19.1.28
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Version 9.19.1.31
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Version 9.19.1.37
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Version 9.19.1.38
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Version 9.19.1.42
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Version 9.20.1
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Version 9.20.1.5
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Version 9.20.2
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Version 9.20.2.10
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Version 9.20.2.21
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Version 9.20.2.22
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Version 9.20.3
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Version 9.20.3.4
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Version 9.20.3.7
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Version 9.20.3.9
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Version 9.20.3.10
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Version 9.20.3.13
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Version 9.20.3.16
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Version 9.20.3.20
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Version 9.20.4
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Version 9.20.4.7
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Version 9.20.4.14
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Version 9.22.1.1
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Version 9.22.1.3
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Version 9.22.1.6
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Version 9.23.1
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Version 9.23.1.13
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Version 9.23.1.19
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Version 9.23.1.22
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HerstellerCisco
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Produkt Cisco Secure Firewall Threat Defense (FTD) Software
Version 6.4.0
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Version 6.4.0.1
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Version 6.4.0.3
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Version 6.4.0.2
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Version 6.4.0.4
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Version 6.4.0.5
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Version 6.4.0.13
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Version 6.4.0.16
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Version 6.4.0.17
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Version 6.4.0.18
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Version 7.0.0
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Version 7.0.0.1
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Version 7.0.1
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Version 7.0.1.1
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Version 7.0.2
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Version 7.0.2.1
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Version 7.0.3
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Version 7.0.4
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Version 7.0.5
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Version 7.0.6
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Version 7.0.6.1
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Version 7.0.6.2
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Version 7.0.6.3
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Version 7.0.7
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Version 7.0.8
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Version 7.0.8.1
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Version 7.1.0
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Version 7.1.0.1
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Version 7.1.0.2
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Version 7.1.0.3
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Version 7.2.0
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Version 7.2.0.1
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Version 7.2.1
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Version 7.2.2
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Version 7.2.3
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Version 7.2.4
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Version 7.2.4.1
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Version 7.2.5
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Version 7.2.5.1
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Version 7.2.6
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Version 7.2.7
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Version 7.2.5.2
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Version 7.2.8
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Version 7.2.8.1
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Version 7.2.9
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Version 7.2.10
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Version 7.2.10.2
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Version 7.3.0
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Version 7.3.1
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Version 7.3.1.1
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Version 7.3.1.2
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Version 7.4.0
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Version 7.4.1
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Version 7.4.1.1
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Version 7.4.2
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Version 7.4.2.1
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Version 7.4.2.2
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Version 7.4.2.3
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Version 7.4.2.4
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Version 7.4.3
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Version 7.6.0
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Version 7.6.1
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Version 7.6.2
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Version 7.6.2.1
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Version 7.7.0
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Version 7.7.10
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Version 7.7.10.1
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Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.02% 0.051
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
psirt@cisco.com 4.3 2.8 1.4
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.