CVE-2025-20360
Multiple Cisco Products Snort 3 MIME Denial of Service Vulnerability
Severity
Medium 5.8
CVSS 3.1
Exploited
Not listed
EPSS
0.004
28.3th percentile
Discovered by
Vendor
Published by the vendor
Published
Oct 15, 2025
Assigned by cisco
Description
Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a lack of complete error checking when the MIME fields of the HTTP header are parsed. An attacker could exploit this vulnerability by sending crafted HTTP 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.
Weakness: CWE-805
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Cyber Vision | OT / IoT Security | cna-assigner |
| Cisco | Cisco Secure Firewall | Firewall / NGFW | cna-assigner |
Vendor-reported affected versions (2)
- Cisco · Cisco Cyber Vision
- Cisco · Cisco Secure Firewall Threat Defense (FTD) Software