Recommended action window: Monitor and triage in normal cycle
NVD description
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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
🔒 #CyberSecurity CVE-2026-20218: Cisco Snort OLE VBA Decompression Stack Buffer Overflow — Detec… "The Zero Day Initiative has published ZDI-26-788, disclosing CVE-2026-20218 — a stack-based…" 🔗 https://securityarsenal.com/blog/cve-2026-20218-cisco-snort-ole-vba-decompression-stack-buffer-overflow-detection-and-remediation-guide #CyberSecurity #ThreatIntel #critical #zeroday #cve