CVE-2026-20054
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…
Published Mar 4, 2026 · updated Aug 20, 2026 · cisco snort
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.
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 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 suc
Aug 20, 2026 · NIST NVD
Updated
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 suc
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 engine3.17.0s
Sources
- CVE.orgVulnerability recordCVE-2026-20054
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-20054
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 at
nvd.nist.gov