CVE-2026-20197Medium· 5.8▾ SunlitMultiple Cisco products are affected by a vulnerability in the Snort 3 Teredo Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 31.9 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 23.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.4%
0.4% → 0.5%
Multiple Cisco products are affected by a vulnerability in the Snort 3 Teredo 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 Snort 3 parses Teredo packets. An attacker could exploit this vulnerability by sending a crafted Teredo packet to a targeted device to be parsed by Snort. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.
open_source_snort3 3.12.2.0open_source_snort3 3.1.2.0open_source_snort3 3.1.3.0open_source_snort3 3.1.4.0open_source_snort3 3.1.5.0open_source_snort3 3.1.6.0open_source_snort3 3.1.7.0open_source_snort3 3.1.8.0open_source_snort3 3.1.9.0open_source_snort3 3.1.10.0open_source_snort3 3.1.12.0open_source_snort3 3.1.13.0open_source_snort3 3.1.14.0open_source_snort3 3.1.15.0open_source_snort3 3.1.16.0open_source_snort3 3.1.17.0open_source_snort3 3.1.18.0open_source_snort3 3.1.19.0open_source_snort3 3.1.20.0open_source_snort3 3.1.21.0open_source_snort3 3.1.22.0open_source_snort3 3.1.23.0open_source_snort3 3.1.24.0open_source_snort3 3.1.25.0open_source_snort3 3.1.27.0open_source_snort3 3.1.28.0open_source_snort3 3.1.29.0open_source_snort3 3.1.30.0open_source_snort3 3.1.31.0open_source_snort3 3.1.32.0open_source_snort3 3.1.36.0open_source_snort3 3.1.38.0open_source_snort3 3.1.39.0open_source_snort3 3.1.40.0open_source_snort3 3.1.41.0open_source_snort3 3.1.42.0open_source_snort3 3.1.43.0open_source_snort3 3.1.45.0open_source_snort3 3.1.47.0open_source_snort3 3.1.48.0open_source_snort3 3.1.50.0open_source_snort3 3.1.51.0open_source_snort3 3.1.52.0open_source_snort3 3.1.53.0open_source_snort3 3.1.55.0open_source_snort3 3.1.56.0open_source_snort3 3.1.57.0open_source_snort3 3.1.58.0open_source_snort3 3.1.59.0open_source_snort3 3.1.60.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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