5.8
Medium
CVE-2026-20066 Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an…
Description
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 an error in the JSTokenizer normalization logic when the HTTP inspection normalizes JavaScript. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly. JSTokenizer is not enabled by default.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Secure Firewall Threat Defense (FTD) Software 7.7 | 7.7.0 → 7.7.10.1 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.6 | 7.6.0 → 7.6.2.1 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | 7.4.0 → 7.4.3 | No fix stated |
| Cisco UTD SNORT IPS Engine Software 17.18 | 17.18.1a → 17.18.2 | No fix stated |
| Cisco UTD SNORT IPS Engine Software | 17.17.1 | No fix stated |
| Cisco UTD SNORT IPS Engine Software | 17.16.1a | No fix stated |
| Cisco UTD SNORT IPS Engine Software 17.15 | 17.15.1a → 17.15.4 | No fix stated |
| Cisco UTD SNORT IPS Engine Software | 17.14.1a | No fix stated |
| Cisco UTD SNORT IPS Engine Software | 17.13.1a | No fix stated |
Show the 11 other branches Hide the 11 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco UTD SNORT IPS Engine Software 17.12 | 17.12.1a → 17.12.6 | No fix stated |
| Cisco UTD SNORT IPS Engine Software | 17.11.1a | No fix stated |
| Cisco UTD SNORT IPS Engine Software | 17.10.1a | No fix stated |
| Cisco UTD SNORT IPS Engine Software 17.9 | 17.9.1a → 17.9.8 | No fix stated |
| Cisco UTD SNORT IPS Engine Software | 17.8.1a | No fix stated |
| Cisco UTD SNORT IPS Engine Software 17.7 | 17.7.1a → 17.7.2 | No fix stated |
| Cisco UTD SNORT IPS Engine Software 17.6 | 17.6.1a → 17.6.8 | No fix stated |
| Cisco UTD SNORT IPS Engine Software 17.5 | 17.5.1a → 17.5.1 | No fix stated |
| Cisco UTD SNORT IPS Engine Software 17.4 | 17.4.1a → 17.4.2 | No fix stated |
| Cisco UTD SNORT IPS Engine Software 17.3 | 17.3.1a → 17.3.8 | No fix stated |
| Cisco UTD SNORT IPS Engine Software | 17.2.1r | No fix stated |
References
- cisco-sa-snort3-multi-dos-XFWkWSwz sec.cloudapps.cisco.com
Timeline
- Published
- Last modified
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