Vulnerability · Published Oct 15, 2025 · Assigned by cisco
CVE-2025-20359Multiple Cisco Products Snort 3 MIME Information Disclosure or Denial of Service Vulnerability
Medium 6.5
In plain English
A medium-severity security flaw in Cisco Cyber Vision from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Official 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 disclosure of possible sensitive data or cause the Snort 3 Detection Engine to crash. This vulnerability is due to an error in the logic of buffer handling when the MIME fields of the HTTP header are parsed. This can result in a buffer under-read. 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 induce one of two possible outcomes: the unexpected restarting of the Snort 3 Detection Engine, which could cause a denial of service (DoS) condition, or information disclosure of sensitive information in the Snort 3 data stream. Due to the under-read condition, it is possible that sensitive information that is not valid connection data could be returned.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Cyber Vision | 3.0.03.0.23.0.33.0.13.1.03.0.43.1.13.1.2 |
| Cisco | Cisco Secure Firewall Threat Defense (FTD) Software | 7.4.17.4.1.17.6.07.4.27.4.2.17.7.07.4.2.27.6.1 |
| Cisco | Cisco UTD SNORT IPS Engine Software | 3.17.1S16.12.316.12.417.3.1a16.6.616.12.23.17.0S16.6.5 |
Weakness: CWE-127 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L