Is CVE-2023-21405 actively exploited?

No active exploitation of CVE-2023-21405 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-21405 be exploited remotely?

Partially. CVE-2023-21405 requires adjacent network access (same network segment) to exploit.

What is the CVSS score of CVE-2023-21405?

CVE-2023-21405 has a CVSS score of 6.5 (MEDIUM).

HOME VULNERABILITIESCVE-2023-21405

MEDIUM

CVE-2023-21405

CWE-1286Published: July 25, 2023· Updated: Jun 17, 2026

6.5

CVSS v3.1

Official Description

Knud from Fraktal.fi has found a flaw in some Axis Network Door Controllers and Axis Network

Intercoms when communicating over OSDP, highlighting that the OSDP message parser crashes

the pacsiod process, causing a temporary unavailability of the door-controlling functionalities

meaning that doors cannot be opened or closed. No sensitive or customer data can be extracted

as the Axis device is not further compromised. Please refer to the Axis security advisory for more information, mitigation and affected products and software versions.

NVD Source

Technical Analysis

CVE-2023-21405 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.

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

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.