CVE-2025-20360Multiple Cisco Products Snort 3 MIME Denial of Service Vulnerability
- 5.8MediumCVSS base score
- 0.38%Exploitation in 30 daysEPSS · top 67% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By cisco
- 12 months later
· 12 months later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ciscoCNA (assigner) | 3.1 | Medium5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L |
| NVDNVD · Deferred | 3.1 | Medium5.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.38% · top 67% of all CVEs (14 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 5.8.
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 7.3.0
- affected 7.3.1
- affected 7.3.1.1
- affected 7.4.0
- affected 7.4.1
- affected 7.4.1.1
- affected 7.3.1.2
- 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
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
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)
- EUVD EUVD-2025-34664 (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://cveledger.app/cve/CVE-2025-20360)Record last updated .