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CVE-2026-20250 (GCVE-0-2026-20250)

Vulnerability from cvelistv5 – Published: 2026-09-16 20:09 – Updated: 2026-09-17 14:54
VLAI
Title
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software for Firepower 3100 and 4200 Series DTLS Denial of Service Vulnerability
Summary
A vulnerability in Datagram TLS (DTLS) message handling of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software for Cisco Secure Firewall 3100 Series and 4200 Series devices could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management when processing certain DTLS messages. An attacker could exploit this vulnerability by sending a crafted stream of DTLS traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 14:54 UTC
CWE
  • CWE-772 - Missing Release of Resource after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version CPE status
Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software Affected: 9.23.1
Affected: 9.22.1.1
Affected: 9.22.1.3
Affected: 9.22.1.6
Affected: 9.22.2
Affected: 9.23.1.3
Affected: 9.22.2.4
Affected: 9.23.1.7
Affected: 9.22.2.9
Affected: 9.23.1.13
Affected: 9.22.2.13
Affected: 9.23.1.19
Affected: 9.22.2.14
Affected: 9.24.1
Affected: 9.23.1.22
Affected: 9.22.2.20
Affected: 9.23.1.26
guessed Create a notification for this product.
Cisco Cisco Secure Firewall Threat Defense (FTD) Software Affected: 7.6.0
Affected: 7.7.0
Affected: 7.6.1
Affected: 7.6.2
Affected: 7.7.10
Affected: 7.7.11
Affected: 7.6.2.1
Affected: 7.7.10.1
Affected: 7.6.4
Affected: 10.0.0
guessed Create a notification for this product.
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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