Multiple Cisco products are affected by a vulnerability in the Snort 3 SMTP MIME Decoder that could allow an unauthenticated, remote attacker to…
Multiple Cisco products are affected by a vulnerability in the Snort 3 SMTP MIME 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 error checking when the MIME fields of the SMTP header are parsed. An attacker could exploit this vulnerability by sending crafted SMTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts.
Read at NIST National Vulnerability Database (CVE API 2.0)
- Vendor
- Cisco
- Product
- Snort
- CVSS
- 5.8
- EPSS
- 0.005 (p45)
- Exposure class
- Endpoint security
Why it ranks 20 (Routine)
- CVSS 5.8 medium
- Product class: endpoint security
- Widely deployed vendor product (Cisco)
- Covered by 2 independent sources
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- NIST National Vulnerability Database (CVE API 2.0) (nvd.nist.gov)
- CVE-2026-20011 on this site · NVD · CVE.org · Vulnpedia
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