CVE-2026-20349

Katalog CVE

CVSS 8.6 · High KEV · sudah dieksploitasi EPSS 1,0%

Kerentanan Improper Clearing of Heap Memory Before Release ('Heap Inspection') pada cisco adaptive security appliance software. Skor CVSS 3.1 8.6 (High) menurut cisco.com. Masuk katalog KEV CISA pada 11 Agustus 2026, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

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.

Advisory KUTIM-CSIRT

• Edge Device Kian Jadi Sasaran: Catatan dari Gelombang Kerentanan Agustus 2026 28 Agt 2026
• Peringatan Keamanan: Kerentanan CVE-2026-20349 pada Cisco Secure Firewall ASA dan FTD 12 Agt 2026

Rincian

Terbit di NVD

11 Agustus 2026

Terakhir diubah

16 September 2026

Status NVD

Analyzed

CVSS 3.1

8.6 (High), sumber cisco.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

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

EPSS (30 hari)

1,0% peluang dieksploitasi; lebih tinggi dari 62,2% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

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

Masuk KEV

11 Agustus 2026

Tenggat CISA

14 Agustus 2026 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

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.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD. Ditampilkan 60 dari 197 konfigurasi; daftar lengkap ada di NVD.

Referensi dan perbaikan

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-dos-dzv4mQFF advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20349 pemerintah AS