CVE-2026-20349

Warnung

Medienbericht

EPSS 0.87%
Veröffentlicht 11.08.2026 17:06:03
Zuletzt bearbeitet 12.08.2026 15:02:21
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Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerability

A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. 

This vulnerability is due to insufficient error checking when processing HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to the Remote Access SSL VPN service on an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Betroffene Produkte Warnungen 1 Metriken 2 CWE 1 Referenzen 10

NVD 197 VulnDex Vulnerability Enrichment 1

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Cisco ≫ Adaptive Security Appliance Software Version9.16.1

Cisco ≫ Adaptive Security Appliance Software Version9.16.1.28

Cisco ≫ Adaptive Security Appliance Software Version9.16.2

Cisco ≫ Adaptive Security Appliance Software Version9.16.2.3

Cisco ≫ Adaptive Security Appliance Software Version9.16.2.7

Cisco ≫ Adaptive Security Appliance Software Version9.16.2.11

Cisco ≫ Adaptive Security Appliance Software Version9.16.2.13

Cisco ≫ Adaptive Security Appliance Software Version9.16.2.14

Cisco ≫ Adaptive Security Appliance Software Version9.16.3

Cisco ≫ Adaptive Security Appliance Software Version9.16.3.3

Cisco ≫ Adaptive Security Appliance Software Version9.16.3.14

Cisco ≫ Adaptive Security Appliance Software Version9.16.3.15

Cisco ≫ Adaptive Security Appliance Software Version9.16.3.19

Cisco ≫ Adaptive Security Appliance Software Version9.16.3.23

Cisco ≫ Adaptive Security Appliance Software Version9.16.4

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.9

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.14

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.19

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.27

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.38

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.39

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.42

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.48

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.55

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.57

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.61

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.62

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.67

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.70

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.71

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.76

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.82

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.84

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.85

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.89

Cisco ≫ Adaptive Security Appliance Software Version9.16.4.92

Cisco ≫ Adaptive Security Appliance Software Version9.18.1

Cisco ≫ Adaptive Security Appliance Software Version9.18.1.3

Cisco ≫ Adaptive Security Appliance Software Version9.18.2

Cisco ≫ Adaptive Security Appliance Software Version9.18.2.5

Cisco ≫ Adaptive Security Appliance Software Version9.18.2.7

Cisco ≫ Adaptive Security Appliance Software Version9.18.2.8

Cisco ≫ Adaptive Security Appliance Software Version9.18.3

Cisco ≫ Adaptive Security Appliance Software Version9.18.3.39

Cisco ≫ Adaptive Security Appliance Software Version9.18.3.46

Cisco ≫ Adaptive Security Appliance Software Version9.18.3.53

Cisco ≫ Adaptive Security Appliance Software Version9.18.3.55

Cisco ≫ Adaptive Security Appliance Software Version9.18.3.56

Cisco ≫ Adaptive Security Appliance Software Version9.18.4

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.5

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.8

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.22

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.24

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.29

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.34

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.40

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.47

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.50

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.52

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.53

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.57

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.66

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.67

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.68

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.71

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.76

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.82

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.90

Cisco ≫ Adaptive Security Appliance Software Version9.18.4.135

Cisco ≫ Adaptive Security Appliance Software Version9.19.1

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.5

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.9

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.12

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.18

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.22

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.24

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.27

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.28

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.31

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.37

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.38

Cisco ≫ Adaptive Security Appliance Software Version9.19.1.42

Cisco ≫ Adaptive Security Appliance Software Version9.20.1

Cisco ≫ Adaptive Security Appliance Software Version9.20.1.5

Cisco ≫ Adaptive Security Appliance Software Version9.20.2

Cisco ≫ Adaptive Security Appliance Software Version9.20.2.10

Cisco ≫ Adaptive Security Appliance Software Version9.20.2.21

Cisco ≫ Adaptive Security Appliance Software Version9.20.2.22

Cisco ≫ Adaptive Security Appliance Software Version9.20.3

Cisco ≫ Adaptive Security Appliance Software Version9.20.3.4

Cisco ≫ Adaptive Security Appliance Software Version9.20.3.7

Cisco ≫ Adaptive Security Appliance Software Version9.20.3.9

Cisco ≫ Adaptive Security Appliance Software Version9.20.3.10

Cisco ≫ Adaptive Security Appliance Software Version9.20.3.13

Cisco ≫ Adaptive Security Appliance Software Version9.20.3.16

Cisco ≫ Adaptive Security Appliance Software Version9.20.3.20

Cisco ≫ Adaptive Security Appliance Software Version9.20.4

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.7

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.10

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.14

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.19

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.22

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.28

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.30

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.34

Cisco ≫ Adaptive Security Appliance Software Version9.20.4.46

Cisco ≫ Adaptive Security Appliance Software Version9.22.1.1

Cisco ≫ Adaptive Security Appliance Software Version9.22.1.2

Cisco ≫ Adaptive Security Appliance Software Version9.22.1.3

Cisco ≫ Adaptive Security Appliance Software Version9.22.1.6

Cisco ≫ Adaptive Security Appliance Software Version9.22.2

Cisco ≫ Adaptive Security Appliance Software Version9.22.2.4

Cisco ≫ Adaptive Security Appliance Software Version9.22.2.9

Cisco ≫ Adaptive Security Appliance Software Version9.22.2.13

Cisco ≫ Adaptive Security Appliance Software Version9.22.2.14

Cisco ≫ Adaptive Security Appliance Software Version9.22.2.20

Cisco ≫ Adaptive Security Appliance Software Version9.22.2.32

Cisco ≫ Adaptive Security Appliance Software Version9.22.3

Cisco ≫ Adaptive Security Appliance Software Version9.22.3.5

Cisco ≫ Adaptive Security Appliance Software Version9.23.1

Cisco ≫ Adaptive Security Appliance Software Version9.23.1.3

Cisco ≫ Adaptive Security Appliance Software Version9.23.1.7

Cisco ≫ Adaptive Security Appliance Software Version9.23.1.13

Cisco ≫ Adaptive Security Appliance Software Version9.23.1.19

Cisco ≫ Adaptive Security Appliance Software Version9.23.1.22

Cisco ≫ Adaptive Security Appliance Software Version9.23.1.26

Cisco ≫ Adaptive Security Appliance Software Version9.23.1.32

Cisco ≫ Adaptive Security Appliance Software Version9.23.1.195

Cisco ≫ Adaptive Security Appliance Software Version9.24.1

Cisco ≫ Adaptive Security Appliance Software Version9.24.1.5

Cisco ≫ Adaptive Security Appliance Software Version9.24.1.9

Cisco ≫ Adaptive Security Appliance Software Version9.24.1.11

Cisco ≫ Adaptive Security Appliance Software Version9.24.1.155

Cisco ≫ Secure Firewall Threat Defense Version7.0.0

Cisco ≫ Secure Firewall Threat Defense Version7.0.0.1

Cisco ≫ Secure Firewall Threat Defense Version7.0.1

Cisco ≫ Secure Firewall Threat Defense Version7.0.1.1

Cisco ≫ Secure Firewall Threat Defense Version7.0.2

Cisco ≫ Secure Firewall Threat Defense Version7.0.2.1

Cisco ≫ Secure Firewall Threat Defense Version7.0.3

Cisco ≫ Secure Firewall Threat Defense Version7.0.4

Cisco ≫ Secure Firewall Threat Defense Version7.0.5

Cisco ≫ Secure Firewall Threat Defense Version7.0.6

Cisco ≫ Secure Firewall Threat Defense Version7.0.6.1

Cisco ≫ Secure Firewall Threat Defense Version7.0.6.2

Cisco ≫ Secure Firewall Threat Defense Version7.0.6.3

Cisco ≫ Secure Firewall Threat Defense Version7.0.7

Cisco ≫ Secure Firewall Threat Defense Version7.0.8

Cisco ≫ Secure Firewall Threat Defense Version7.0.8.1

Cisco ≫ Secure Firewall Threat Defense Version7.0.9

Cisco ≫ Secure Firewall Threat Defense Version7.2.0

Cisco ≫ Secure Firewall Threat Defense Version7.2.0.1

Cisco ≫ Secure Firewall Threat Defense Version7.2.1

Cisco ≫ Secure Firewall Threat Defense Version7.2.2

Cisco ≫ Secure Firewall Threat Defense Version7.2.3

Cisco ≫ Secure Firewall Threat Defense Version7.2.4

Cisco ≫ Secure Firewall Threat Defense Version7.2.4.1

Cisco ≫ Secure Firewall Threat Defense Version7.2.5

Cisco ≫ Secure Firewall Threat Defense Version7.2.5.1

Cisco ≫ Secure Firewall Threat Defense Version7.2.5.2

Cisco ≫ Secure Firewall Threat Defense Version7.2.6

Cisco ≫ Secure Firewall Threat Defense Version7.2.7

Cisco ≫ Secure Firewall Threat Defense Version7.2.8

Cisco ≫ Secure Firewall Threat Defense Version7.2.8.1

Cisco ≫ Secure Firewall Threat Defense Version7.2.9

Cisco ≫ Secure Firewall Threat Defense Version7.2.10

Cisco ≫ Secure Firewall Threat Defense Version7.2.10.2

Cisco ≫ Secure Firewall Threat Defense Version7.2.11

Cisco ≫ Secure Firewall Threat Defense Version7.2.12

Cisco ≫ Secure Firewall Threat Defense Version7.3.0

Cisco ≫ Secure Firewall Threat Defense Version7.3.1

Cisco ≫ Secure Firewall Threat Defense Version7.3.1.1

Cisco ≫ Secure Firewall Threat Defense Version7.3.1.2

Cisco ≫ Secure Firewall Threat Defense Version7.4.0

Cisco ≫ Secure Firewall Threat Defense Version7.4.1

Cisco ≫ Secure Firewall Threat Defense Version7.4.1.1

Cisco ≫ Secure Firewall Threat Defense Version7.4.2

Cisco ≫ Secure Firewall Threat Defense Version7.4.2.1

Cisco ≫ Secure Firewall Threat Defense Version7.4.2.2

Cisco ≫ Secure Firewall Threat Defense Version7.4.2.3

Cisco ≫ Secure Firewall Threat Defense Version7.4.2.4

Cisco ≫ Secure Firewall Threat Defense Version7.4.3

Cisco ≫ Secure Firewall Threat Defense Version7.4.4

Cisco ≫ Secure Firewall Threat Defense Version7.4.7

Cisco ≫ Secure Firewall Threat Defense Version7.4.8

Cisco ≫ Secure Firewall Threat Defense Version7.6.0

Cisco ≫ Secure Firewall Threat Defense Version7.6.1

Cisco ≫ Secure Firewall Threat Defense Version7.6.2

Cisco ≫ Secure Firewall Threat Defense Version7.6.2.1

Cisco ≫ Secure Firewall Threat Defense Version7.6.4

Cisco ≫ Secure Firewall Threat Defense Version7.7.0

Cisco ≫ Secure Firewall Threat Defense Version7.7.10

Cisco ≫ Secure Firewall Threat Defense Version7.7.10.1

Cisco ≫ Secure Firewall Threat Defense Version7.7.11

Cisco ≫ Secure Firewall Threat Defense Version7.7.13

Cisco ≫ Secure Firewall Threat Defense Version10.0.0

Cisco ≫ Secure Firewall Threat Defense Version10.0.2

VulnDex Vulnerability Enrichment

Diese Information steht angemeldeten Benutzern zur Verfügung.

11.08.2026: CISA Known Exploited Vulnerabilities (KEV) Catalog

Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection Vulnerability

Schwachstelle

Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) contain a heap inspection vulnerability that could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.

Beschreibung

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Erforderliche Maßnahmen

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	0.87%	0.558

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
Cisco PSIRT	8.6	3.9	4	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CWE-244 Improper Clearing of Heap Memory Before Release ('Heap Inspection')

Using realloc() to resize buffers that store sensitive information can leave the sensitive information exposed to attack, because it is not removed from memory.