CVE-2026-76418（cisco adaptive security appliance software）の深刻度・悪用状況・対象バージョン
8.6 重要（CVSS 3.x） 悪用確認済み（CISA KEV） EPSS 取得中…
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.
実際の攻撃で悪用されています。 CISA KEV への追加日: 2026-10-29。対象製品を使っている場合は最優先で対策してください。
CISA の要求対応: 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.
CISA の要求対応: 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.
影響を受ける製品
| ベンダー | 製品 | 対象バージョン |
|---|---|---|
| cisco | adaptive_security_appliance_software | < 9.16.4.104 |
| cisco | adaptive_security_appliance_software | ≥ 9.18 かつ < 9.18.4.96 |
| cisco | adaptive_security_appliance_software | ≥ 9.19 かつ < 9.20.4.50 |
| cisco | adaptive_security_appliance_software | ≥ 9.22 かつ < 9.22.3.200 |
| cisco | adaptive_security_appliance_software | ≥ 9.23 かつ < 9.23.1.48 |
| cisco | adaptive_security_appliance_software | ≥ 9.24.1 かつ < 9.24.1.27 |
| cisco | adaptive_security_appliance_software | 9.24.10 |
| cisco | secure_firewall_threat_defense | < 7.0.11 |
| cisco | secure_firewall_threat_defense | ≥ 7.2.0 かつ < 7.2.13 |
| cisco | secure_firewall_threat_defense | ≥ 7.3.0 かつ < 7.4.9 |
| cisco | secure_firewall_threat_defense | ≥ 7.6.0 かつ ≤ 7.6.7 |
| cisco | secure_firewall_threat_defense | ≥ 7.7.0 かつ < 7.7.14 |
| cisco | secure_firewall_threat_defense | ≥ 10.0.0 かつ < 10.0.3 |
| cisco | secure_firewall_threat_defense | 10.1.0 |
基本情報
- 公開日
- 2026-10-28
- 最終更新
- 2026-10-30
- NVD の状態
- Analyzed
- 弱点の種類
- CWE-690
対策の進め方
- 上の表で、使っている製品とバージョンが対象か確認します。
- ベンダーの公式アドバイザリ（下の参考情報の「Vendor Advisory」「Patch」）で修正版・回避策を確認します。
- 悪用が確認されているため、パッチ適用までの間もアクセス制限・侵害の痕跡確認を検討します。
- 日本語の情報は JVN iPedia で CVE-2026-76418 を検索 できます。
参考情報
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-tunnel-dos-s6mgkb75 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76418 US Government Resource
- NVD: CVE-2026-76418
- CVE.org: CVE-2026-76418
データ出典: NIST NVD、CISA KEV、FIRST EPSS。翻訳は参考情報で、正確性は原文を優先してください。