VSF-Display Series 9.5 Release Notes
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This document provides the release notes for VSFF8MP 9.5 with incremental bug fix releases. The release notes describe new features, improvements and issues fixed after vsff8mp-9.4.3.1.
Release info
Name: VSF-Fortitude8
Description: vsff8mp is a firmware for devices in the Zenitel Display Series.
The firmware is delivered in two different files:
- vsff8mp-9.5.3.x - Used for standard in-field upgrades
- vsff8mp-prod-9.5.3.x - Used in production- and recovery upgrades.
Version: 9.5.3.0
Date: 10.06.2026
Status: General Availability
VSFF8MP 9.5.3.0
Fixed Issues
MTN-4860 Fixed an issue where calls using SRTP encryption could produce random noise at the start
In delayed-offer SIP scenarios (e.g., with IPC Unigy), encrypted audio packets could arrive before the decryption key was established. The device now silently discards these packets, ensuring clean audio from the start of every encrypted call.
DS-1703 ZDD-1 Improved audio frequency response on Mic and Loudspeaker signals
Optimized audio equalization filters for both microphone and loudspeaker signal paths on ZDD-1 stations. A high-frequency resonance on the microphone input has been removed, and the loudspeaker frequency response has been flattened, resulting in clearer and more natural-sounding voice communication.
Security fixes
DS-1720 Disabled SNMP port by default in firewall
The SNMP port is now disabled by default in the firewall on all new and factory-reset devices. Customers who require SNMP must enable it manually in the device configuration before use.
DS-1683 Security Update
Resolved vulnerabilities related to CVE-2025-15467 - Stack buffer overflow
Action: Upgrade to 9.5.3.0 or later
DS-1662 The SSH password to Zenitel devices in 9.5 release has been changed
Due to stricter cybersecurity requirements Zenitel has decided to protect against threats by limiting SSH access