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Findings

CVE-2026-20058

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…

Published Mar 4, 2026 · updated Aug 20, 2026 · cisco snort

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.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 4, 2026 · NIST NVD

    Detected

    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

  2. Aug 20, 2026 · NIST NVD

    Updated

    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

Affected

  • cpe cisco/secure firewall threat defense7.2.0
  • cpe cisco/secure firewall threat defense7.2.0.1
  • cpe cisco/secure firewall threat defense7.2.1
  • cpe cisco/secure firewall threat defense7.2.2
  • cpe cisco/secure firewall threat defense7.2.3
  • cpe cisco/secure firewall threat defense7.2.4
  • cpe cisco/secure firewall threat defense7.2.4.1
  • cpe cisco/snortversion unspecified
  • cpe cisco/unified threat defense snort intrusion prevention system engine17.9.3a

Sources

  • NIST NVDVulnerability recordCVE-2026-20058

    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 atta

    nvd.nist.gov

References