CVE-2026-20221: CVE-2026-20221: NULL işaretçi başvurusu

Açıklama (NVD)

Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine. This vulnerability is due to improper handling of nested GRE traffic. An attacker could exploit this vulnerability by sending a crafted GRE payload through an affected device. A successful exploit could allow the attacker to trigger an unexpected reload of the Snort 3 Detection Engine, resulting in either a bypass or denial of service (DoS) condition, depending on device configuration. For more information, see the section of this advisory. The Snort 3 Detection Engine will restart automatically. No manual intervention is required.

Özet bilgiler

CVSS v3.1

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

EPSS

%0,58 (yüzdelik 48)

CWE

CWE-476

Yama

Yok / bilinmiyor

İlgili haberler

• Multiple Cisco Products Snort 3 Generic Routing Encapsulation Denial of Service Vulnerability
• Cisco Advance Notification for Publication of October 21, 2026, Security Advisories

Kaynaklar

• NVD kaydı
• sec.cloudapps.cisco.com
• CWE-476