Is CVE-2026-20005 actively exploited?

No active exploitation of CVE-2026-20005 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-20005 be exploited remotely?

Yes. CVE-2026-20005 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-20005?

CVE-2026-20005 has a CVSS score of 5.8 (MEDIUM).

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MEDIUM

CVE-2026-20005

CWE-392Published: March 4, 2026· Updated: Mar 4, 2026

5.8

CVSS v3.1

EPSS:0.07%probability of exploitation in 30 daysPercentile:20.7th

Official Description

Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.

This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.

NVD Source

Technical Analysis

CVE-2026-20005 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.