CVE-2026-20068
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 Aug 18, 2026 · cisco snort
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 error checking when parsing remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending crafted RPC packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.
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 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 error checking when parsing remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending
Aug 18, 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 error checking when parsing remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending
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 defense7.2.4
- cpe cisco/snortversion unspecified
- cpe cisco/unified threat defense snort intrusion prevention system engine17.2.1r
Sources
- CVE.orgVulnerability recordCVE-2026-20068
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-20068
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