Cisco · Secure Firewall ASA Software and Cisco Secure FTD Software
CVE-2026-76418
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Tunnel Denial of Service Vulnerability
概要
A vulnerability in the Remote Access SSL VPN service of 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 logic errors when secondary authentication is configured on a tunnel group. An attacker could exploit this vulnerability by sending a crafted request when connecting to the SSL remote access VPN. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
CISA: Cisco Secure Firewall ASA Software and Cisco Secure FTD Software contains an unchecked return value to NULL pointer dereference vulnerability that could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.
対処法
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.
米国連邦機関の対応期限：2026年11月1日
Ciscoのその他の悪用された脆弱性
| 追加日 | 脆弱性 | 製品 | 深刻度 | 攻撃の可能性 |
|---|---|---|---|---|
| 2026/11/10 | Improper Restriction of XML External Entity Reference | BroadWorks | 高 7.5 | 0.8% |
| 2026/10/14 | Relative Path Traversal | Secure Email Gateway | 緊急 9.8 | 6.2% |
| 2026/09/30 | Hex Encoding | Catalyst SD-WAN Manager | 緊急 9.8 | 39% |
| 2026/09/16 | Incorrect Use of Privileged APIs | Identity Services Engine | 緊急 10.0 | 76% |
| 2026/09/14 | SQL Injection | Secure Email Gateway | 緊急 9.8 | 40% |
| 2026/09/09 | Firewall Management Center Authentication Bypass Using an Alternate Path or Channel | Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management | 緊急 10.0 | 89% |
| 2026/08/11 | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection | Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) | 高 8.6 | 1.0% |
| 2026/07/29 | Secure Firewall Management Center Use of Hard-coded Password | Secure Firewall Management Center (FMC) | 中 5.3 | 35% |
出典：Known Exploited Vulnerabilities（CISA、パブリックドメイン）、CVE records（cve.org）、EPSS（FIRST）。攻撃の可能性は、今後30日以内に誰かがその脆弱性の悪用を試みるというEPSSの推定値です。