CVE-2026-20054

MEDIUM
2026-03-04 [email protected]
5.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:05 vuln.today
CVE Published
Mar 04, 2026 - 18:16 nvd
MEDIUM 5.8

Tags

Cisco Denial Of Service

Description

Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.  This vulnerability is due to improper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to enter an infinite loop, causing a DoS condition.

Analysis

Improper error checking in Cisco Snort 3's VBA decompression feature allows unauthenticated remote attackers to trigger an infinite loop by sending specially crafted VBA data, causing a denial of service condition. The vulnerability affects multiple Cisco products and requires no user interaction or authentication to exploit. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

29
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +29
POC: 0

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CVE-2026-20054 vulnerability details – vuln.today
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