Vulnerability in Cisco Cyber Vision
CVE-2025-20359
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (40.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Cisco Cyber Vision — versions 3.0.0, 3.0.2, 3.0.3
- Cisco Secure Firewall Threat Defense (Ftd) Software — versions 7.4.1, 7.4.1.1, 7.6.0
- Cisco Utd Snort Ips Engine Software — versions 3.17.1S, 16.12.3, 16.12.4
- Cisco Snort
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2025-20359?
- CVE-2025-20359 is a medium-severity vulnerability in Cisco Cyber Vision, classified under Buffer Under-read. CVSS score: 6.5/10. Published 2025-10-15.
- How severe is CVE-2025-20359?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-20359 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.