Detections
Analytics
Multiple Cisco Products Snort 3 Visual Basic for Applications DoS Vulnerabilities (cisco-sa-ftd-snort3-vbavuls-96UcVVed_CVE-2026-20053_CVE-2026-20054_CVE-2026-20057)
medium Nessus Plugin ID 301697
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, Cisco ASA Software is affected by multiple vulnerabilities.- 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. (CVE-2026-20053)
- Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to crash. This vulnerability is due to lack of proper error checking when decompressing VBA data. An attacker could exploit this vulnerability by sending a 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 a denial of service (DoS) condition. (CVE-2026-20057)
- Multiple Cisco products are affected by a vulnerability in the Snort 3 VBA feature that could...
(CVE-2026-20054)
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwq23369, CSCwq23372, CSCwq23373, CSCwq23377, CSCwq97494, CSCwq97497, CSCwq97658, CSCwq97660, CSCwq97748, CSCwq97750, CSCwr21406See Also
http://www.nessus.org/u?39d02a28
http://www.nessus.org/u?73afe95c
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq23369
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq23372
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq23373
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq23377
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq97494
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq97497
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq97658
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq97660
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq97748
Plugin Details
Severity: Medium
ID: 301697
File Name: cisco-sa-ftd-snort3-vbavuls-96UcVVed_CVE-2026-20053_CVE-2026-20054_CVE-2026-20057-asa.nasl
Version: 1.2
Type: local
Family: CISCO
Published: 3/10/2026
Updated: 3/11/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 3.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2026-20057
CVSS v3
Risk Factor: Medium
Base Score: 5.8
Temporal Score: 5.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:cisco:adaptive_security_appliance_software
Required KB Items: Host/Cisco/ASA/model
Exploit Ease: No known exploits are available
Patch Publication Date: 3/4/2026
Vulnerability Publication Date: 3/4/2026