CVE-2026-20005
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detec…
Published Mar 4, 2026 · updated Sep 1, 2026 · cisco cyber vision
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.
Code
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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 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL hand
Sep 1, 2026 · NIST NVD
Updated
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL hand
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/cyber vision3.1.0
- cpe cisco/secure firewall threat defense7.6.0
- cpe cisco/snortversion unspecified
- cpe cisco/unified threat defense snort intrusion prevention system engine17.9.4
Sources
- CVE.orgVulnerability recordCVE-2026-20005
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-20005
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomp
nvd.nist.gov