Detections
Analytics
Multiple Cisco Products Snort 3 Visual Basic for Applications Buffer Overflow DoS (cisco-sa-snort3-vba-bufdos-jAuFdvn9)
medium Nessus Plugin ID 369975
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, Cisco ASA Software is affected by a vulnerability.- A vulnerability in the Snort 3 Visual Basic for Applications (VBA) Decompression Engine of multiple Cisco products could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper range checking when Snort 3 decompresses VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine of a targeted device. A successful exploit could allow the attacker to cause an overflow of stack data, which could result in a DoS condition. (CVE-2026-20218)
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwv01924See Also
Plugin Details
Severity: Medium
ID: 369975
File Name: cisco-sa-snort3-vba-bufdos-jAuFdvn9-asa.nasl
Version: 1.1
Type: Local
Family: CISCO
Published: 10/21/2026
Updated: 10/21/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.2
Percentile: 50.37
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-2026-20218
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: 10/21/2026
Vulnerability Publication Date: 10/21/2026
Reference Information
CVE: CVE-2026-20218