CVE-2026-20218
published 2026-10-21CVE-2026-20218: A vulnerability in the Snort 3 Visual Basic for Applications (VBA) Decompression Engine of multiple Cisco products could allow an unauthenticated, remote…
PriorityP335medium5.8CVSS 3.1
AVNACLPRNUINSCCNINAL
EPSS
0.42%
34.8th percentile
A vulnerability in the Snort 3 Visual Basic for Applications (VBA) Decompression Engine of multiple Cisco products could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper range checking when Snort 3 decompresses VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine of a targeted device. A successful exploit could allow the attacker to cause an overflow of stack data, which could result in a DoS condition.
Affected
186 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
| cisco | cisco_open_source_snort3 | — | — |
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No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-10-21
Published