Is CVE-2026-20052 actively exploited?

CVE-2026-20052 has no public evidence of in-the-wild exploitation as of 2026-03-05.

What is the CVSS score for CVE-2026-20052?

CVE-2026-20052 has a CVSS score of 5.8 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.

How do I patch CVE-2026-20052?

Patch guidance is available from Cisco security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-20052.

Which products are affected by CVE-2026-20052?

1 product: Cisco Awaiting Analysis.

CVE-2026-20052 - remediation guidance & executive summary

Description

A vulnerability in the memory management handling for the Snort 3 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a logic error in memory management when a device is performing Snort 3 SSL packet inspection. An attacker could exploit this vulnerability by sending crafted SSL packets through an established connection to be parsed by the Snort 3 Detection Engine. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: changed
Confidentiality: none
Integrity: none
Availability: low
Weaknesses: CWE-788

Metadata

Primary Vendor: CISCO
Published: 3/4/2026
Last Modified: 3/5/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

Cisco : Awaiting Analysis

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-20052. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-20052

View on NIST NVD

CVE-2026-20052 vulnerability