CVE-2025-20359
Multiple Cisco Products Snort 3 MIME Information Disclosure or Denial of Service Vulnerability
- Published
- Updated
- Reserved
- 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 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ciscoCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L |
| NVDNVD · Analyzed | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.48% · top 58% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
- affected 3.0.0
- affected 3.0.2
- affected 3.0.3
- affected 3.0.1
- affected 3.1.0
- affected 3.0.4
- affected 3.1.1
- affected 3.1.2
- affected 3.2.0
- affected 3.0.5
- affected 3.2.1
- affected 3.0.6
- affected 3.2.2
- affected 3.2.3
- affected 3.2.4
- affected 4.0.0
- affected 4.0.1
- affected 4.0.2
- affected 4.0.3
- affected 4.1.0
- affected 4.1.1
- affected 4.1.2
- affected 4.1.3
- affected 4.1.4
- affected 4.2.0
- affected 4.2.1
- affected 4.1.5
- affected 4.2.2
- affected 4.2.X
- affected 4.2.3
- affected 4.2.4
- affected 4.2.6
- affected 4.1.6
- affected 4.3.0
- affected 4.3.1
- affected 4.3.2
- affected 4.3.3
- affected 4.4.0
- affected 4.4.1
- affected 4.4.2
- and 11 more
Cisco · Cisco Secure Firewall Threat Defense (FTD) Software
- affected 7.4.1
- affected 7.4.1.1
- affected 7.6.0
- affected 7.4.2
- affected 7.4.2.1
- affected 7.7.0
- affected 7.4.2.2
- affected 7.6.1
- affected 7.4.2.3
- affected 7.4.2.4
Cisco · Cisco UTD SNORT IPS Engine Software
- affected 3.17.1S
- affected 16.12.3
- affected 16.12.4
- affected 17.3.1a
- affected 16.6.6
- affected 16.12.2
- affected 3.17.0S
- affected 16.6.5
- affected 17.2.1r
- affected 17.1.1
- affected 16.6.7a
- affected 16.6.1
- affected 16.12.1a
- affected 17.3.2
- affected 17.4.1a
- affected 16.12.5
- affected 17.5.1
- affected 16.6.9
- affected 17.3.3
- affected 17.5.1a
- affected 17.3.4
- affected 17.3.4a
- affected 17.4.2
- affected 17.4.1b
- affected 17.6.1a
- affected 16.6.10
- affected 17.7.1a
- affected 16.12.6
- affected 17.6.2
- affected 17.8.1a
- affected 16.12.7
- affected 17.3.5
- affected 17.6.3
- affected 17.6.3a
- affected 17.7.2
- affected 17.9.1a
- affected 17.6.4
- affected 17.3.6
- affected 16.12.8
- affected 17.3.7
- and 24 more
What to do
Exploitation: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
References (1)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-20359)Record last updated .