CVE-2026-20057
Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacke…
Published Mar 4, 2026 · updated Aug 20, 2026 · cisco snort
Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a 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 unexpectedly restart causing a a denial of service (DoS) condition.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 4, 2026 · NIST NVD
Detected
Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a crafted VBA data to the Snort 3 Detec
Aug 20, 2026 · NIST NVD
Updated
Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a crafted VBA data to the Snort 3 Detec
Affected
- cpe cisco/cyber vision3.0.0
- cpe cisco/cyber vision3.0.1
- cpe cisco/cyber vision3.0.2
- cpe cisco/cyber vision3.0.3
- cpe cisco/cyber vision3.0.4
- cpe cisco/cyber vision3.0.5
- cpe cisco/cyber vision3.0.6
- cpe cisco/secure firewall threat defense7.2.0
- cpe cisco/snortversion unspecified
- cpe cisco/unified threat defense snort intrusion prevention system engine17.12.1a
Sources
- CVE.orgVulnerability recordCVE-2026-20057
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-20057
Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to lack of proper erro
nvd.nist.gov