CVE-2026-20057
Denial of Service in Cisco Snort 3 via VBA Decompression
Publication date: 2026-03-04
Last updated on: 2026-03-04
Assigner: Cisco Systems, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cisco | snort_3 | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-369 | The product divides a value by zero. |
Attack-Flow Graph
AI Powered Q&A
What immediate steps should I take to mitigate this vulnerability?
I don't know
Can you explain this vulnerability to me?
This vulnerability affects multiple Cisco products that use the Snort 3 Visual Basic for Applications (VBA) feature. It arises from improper error checking when decompressing VBA data. An unauthenticated, remote attacker can exploit this by sending specially crafted VBA data to the Snort 3 Detection Engine on the targeted device.
If successfully exploited, the attacker can cause the Snort 3 Detection Engine to crash and restart unexpectedly, leading to a denial of service (DoS) condition.
How can this vulnerability impact me? :
The primary impact of this vulnerability is a denial of service (DoS) condition. An attacker can cause the Snort 3 Detection Engine to crash and restart unexpectedly, which may disrupt network security monitoring and intrusion detection capabilities.
This disruption could reduce the effectiveness of security defenses, potentially allowing other attacks to go undetected during the downtime.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know