Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
5.8
Cisco Products: Malicious VBA Data Can Crash Snort 3 Detection Engine
CVE-2026-20058
Summary
Some Cisco products that use Snort 3 are at risk of crashing when receiving malicious data. This could be exploited by an attacker to shut down the system, making it unavailable to legitimate users. Cisco has not yet released a fix, but users should be cautious and monitor for updates.
Original title
Multiple Cisco products are affected by vulnerabilities in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.
These vuln...
Original description
Multiple Cisco products are affected by vulnerabilities in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash.
These vulnerabilities are due to improper error checking when decompressing VBA data. An attacker could exploit these vulnerabilities by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to unexpectedly restart, causing a DoS condition.
These vulnerabilities are due to improper error checking when decompressing VBA data. An attacker could exploit these vulnerabilities by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to unexpectedly restart, causing a DoS condition.
nvd CVSS3.1
5.8
Vulnerability type
CWE-786
Published: 4 Mar 2026 · Updated: 13 Mar 2026 · First seen: 6 Mar 2026