A vulnerability in the Snort 3 Visual Basic for Applications (VBA) Decompression Engine of multiple Cisco products could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper range checking when Snort 3 decompresses VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine of a targeted device. A successful exploit could allow the attacker to cause an overflow of stack data, which could result in a DoS condition.
References
Configurations
No configuration.
History
22 Oct 2026, 19:17
| Type | Values Removed | Values Added |
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| Summary | (en) A vulnerability in the Snort 3 Visual Basic for Applications (VBA) Decompression Engine of multiple Cisco products could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper range checking when Snort 3 decompresses VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine of a targeted device. A successful exploit could allow the attacker to cause an overflow of stack data, which could result in a DoS condition. |
21 Oct 2026, 17:18
| Type | Values Removed | Values Added |
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| New CVE |
Information
Published : 2026-10-21 17:18
Updated : 2026-10-22 19:17
NVD link : CVE-2026-20218
Mitre link : CVE-2026-20218
CVE.ORG link : CVE-2026-20218
JSON object : View
Products Affected
No product.
CWE
CWE-121
Stack-based Buffer Overflow