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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.

PUBLISHED Reserved 2025-10-08 | Published 2026-03-04 | Updated 2026-03-04 | Assigner cisco




MEDIUM: 5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Problem types

Access of Memory Location Before Start of Buffer

Product status

Default status
unknown

7.2.0
affected

7.2.0.1
affected

7.2.1
affected

7.3.0
affected

7.2.2
affected

7.2.3
affected

7.3.1
affected

7.2.4
affected

7.2.5
affected

7.2.4.1
affected

7.3.1.1
affected

7.4.0
affected

7.2.5.1
affected

7.4.1
affected

7.2.6
affected

7.4.1.1
affected

7.2.7
affected

7.2.5.2
affected

7.3.1.2
affected

7.2.8
affected

7.6.0
affected

7.4.2
affected

7.2.8.1
affected

7.4.2.1
affected

7.2.9
affected

7.7.0
affected

7.4.2.2
affected

7.2.10
affected

7.6.1
affected

7.4.2.3
affected

7.6.2
affected

7.7.10
affected

7.6.2.1
affected

7.7.10.1
affected

7.4.2.4
affected

7.2.10.2
affected

7.4.3
affected

Default status
unknown

17.9.3a
affected

17.12.1a
affected

17.12.2
affected

17.13.1a
affected

17.9.5a
affected

17.12.3
affected

17.14.1a
affected

17.12.4
affected

17.12.3a
affected

17.15.1a
affected

17.9.6
affected

17.16.1a
affected

17.12.4a
affected

17.15.2c
affected

17.12.4b
affected

17.15.2a
affected

17.12.5
affected

17.17.1
affected

17.12.5a
affected

17.15.3a
affected

17.15.3
affected

17.12.5b
affected

17.12.5c
affected

17.15.4
affected

17.18.1
affected

17.18.1a
affected

17.12.6
affected

17.15.4c
affected

17.12.5d
affected

17.18.2
affected

References

sec.cloudapps.cisco.com/...co-sa-ftd-snort3-vbavuls-96UcVVed (cisco-sa-ftd-snort3-vbavuls-96UcVVed)

cve.org (CVE-2026-20058)

nvd.nist.gov (CVE-2026-20058)

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