What is the CVSS score of CVE-2026-20057?

CVE-2026-20057 has a CVSS 3.1 base score of 5.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L. EPSS exploitation probability: 0.1%.

Which versions of Cisco are affected by CVE-2026-20057?

CVE-2026-20057 presents moderate security risk rated CVSS 5.8. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-20057?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Cisco CVE-2026-20057

MEDIUM

Divide By Zero (CWE-369)

2026-03-04 psirt@cisco.com

Cisco Denial Of Service

5.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.8 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:05 vuln.today

CVE Published

Mar 04, 2026 - 18:16 nvd

MEDIUM 5.8

DescriptionCVE.org

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.

AnalysisAI

Denial of service in Cisco Snort 3's VBA decompression feature allows unauthenticated remote attackers to crash the detection engine by sending maliciously crafted VBA data. The vulnerability stems from insufficient error checking during VBA data processing, enabling attackers to trigger unexpected restarts of the Snort 3 Detection Engine. No patch is currently available for this medium-severity issue affecting multiple Cisco products.

Technical ContextAI

Classified as CWE-369 (Divide By Zero). 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

Affected ProductsAI

Multiple Cisco products are affected by a vulnerability in the Snort 3 Visual Basic for Applications (VBA) feature which could allow an unauthenticate