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Description

Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to improper range checking when decompressing VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine on the targeted device. A successful exploit could allow the attacker to cause an overflow of heap data, which could cause 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

Heap-based Buffer Overflow

Product status

Default status
unknown

3.0.0
affected

3.0.2
affected

3.0.3
affected

3.0.1
affected

3.1.0
affected

3.0.4
affected

3.1.1
affected

3.1.2
affected

3.2.0
affected

3.0.5
affected

3.2.1
affected

3.0.6
affected

3.2.2
affected

3.2.3
affected

3.2.4
affected

4.0.0
affected

4.0.1
affected

4.0.2
affected

4.0.3
affected

4.1.0
affected

4.1.1
affected

4.1.2
affected

4.1.3
affected

4.1.4
affected

4.2.0
affected

4.2.1
affected

4.1.5
affected

4.2.2
affected

4.2.X
affected

4.2.3
affected

4.2.4
affected

4.2.6
affected

4.1.6
affected

4.3.0
affected

4.3.1
affected

4.3.2
affected

4.3.3
affected

4.4.0
affected

4.4.1
affected

4.4.2
affected

4.4.3
affected

4.1.7
affected

5.0.0
affected

5.0.1
affected

5.0.2
affected

5.1.0
affected

5.1.1
affected

5.1.2
affected

5.1.3
affected

5.2.0
affected

5.2.1
affected

5.3.0
affected

5.3.1
affected

5.3.2
affected

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

17.12.1a
affected

17.9.4
affected

17.12.2
affected

17.13.1a
affected

17.12.3
affected

17.14.1a
affected

17.12.4
affected

17.12.3a
affected

17.15.1a
affected

17.16.1a
affected

17.9.5e
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-2026-20053)

nvd.nist.gov (CVE-2026-20053)

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