CVE-2026-20349: Cisco ASA/FTD SSL VPN'de Hizmet Reddi Açığı

Cisco ASA/FTD cihazlarındaki SSL VPN servisi, güvenilmeyen HTTP istekleriyle beklenmedik yeniden başlatmaya neden olabilir. Saldırgan bu sayede hizmeti durdurabilir (DoS). Hemen cihaz yazılımını güncelleyin.

Türkçe özet yapay zekâ ile üretildi.

Açıklama (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.

Özet bilgiler

Ürün

Cisco Adaptive Security Appliance Software

CVSS v3.1

8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS

%1,01 (yüzdelik 63)

CWE

CWE-244

Yama

Yok / bilinmiyor

KEV

Eklenme: 2026-08-11 · Son tarih: 2026-08-14

Gerekli aksiyon: 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.

Etkilenen sürümler

Kaynaklar

• NVD kaydı
• sec.cloudapps.cisco.com
• www.cisa.gov
• CWE-244
• CISA KEV kataloğu