External risk intelligence

Poly Voice ICE Buffer Overflow Remote Code Execution.

CVE advisorySeverity: CRITICAL (CVSS 9.2)

CVE-2026-0826

The vulnerability affects Poly Voice products using Interactive Connectivity Establishment (ICE). While these devices are often deployed within internal enterprise or office networks, ICE is a protocol designed for establishing media sessions, and in some configurations, these devices may be reachable or interact with services that could be exposed to external network traffic.

Remote Code Execution

Halo Surface Signal: 3 out of 5 — possibly public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a critical vulnerability identified in Poly Voice products running on Linux. When a specific feature, Interactive Connectivity Establishment (ICE), is enabled, a buffer overflow flaw could allow remote code execution. While the primary concern is confirming if our Poly Voice products are affected and to what extent, this type of vulnerability can have significant implications for system integrity if exploited.

Remote code execution risk in voice products.
Critical flaw impacting specific product configurations.
Confirm relevance and assess potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted network traffic to vulnerable Poly Voice products. This would be possible if the administrator has enabled Interactive Connectivity Establishment (ICE). Successful exploitation could allow an attacker to execute arbitrary code on the device.

Requires network access and ICE enabled.
Triggered by sending malformed network packets.
Risk of remote code execution on the device.

Live Threat

Current exploitation, exposure, and threat context

When Interactive Connectivity Establishment (ICE) is enabled on Poly Voice products running Linux, a buffer overflow vulnerability could potentially allow for remote code execution. This could affect the system's integrity and allow an attacker to execute arbitrary code.

System integrity and code execution.
Remote execution via network interaction.
Compromise of voice product functionality.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability affects Poly Voice products on Linux when Interactive Connectivity Establishment (ICE) is enabled, potentially allowing remote code execution. Responsibility for addressing this issue likely falls to infrastructure or platform teams, in coordination with security and vendor management. The initial focus should be on identifying all instances of the affected products, assessing their exposure and business criticality, and then planning a targeted remediation strategy based on risk.

Identify affected Poly Voice products.
Verify network exposure and business criticality.
Plan targeted remediation based on risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is Poly Voice and where is this software used?

Poly Voice products are professional communication endpoints, such as IP desk phones and conference systems, running on Linux. These devices are widely deployed across enterprise and office environments to manage voice-over-IP calls and multimedia conferencing sessions.

What does CWE-121 mean for CVE-2026-0826?

CWE-121 refers to a stack-based buffer overflow. In plain terms, this means the software does not properly manage the amount of data being copied into a reserved memory area. If an attacker sends an oversized or malformed packet, it can overwrite adjacent memory, potentially allowing them to run unauthorized code on the device.

How is this vulnerability triggered?

The flaw is triggered when an attacker sends specially crafted network traffic to a device with Interactive Connectivity Establishment (ICE) enabled. If ICE is disabled, the specific code path that leads to the buffer overflow remains inactive, meaning the device is not susceptible to this attack vector.

Is my device at risk based on Halo Surface Signal?

Halo Surface Signal assesses the risk as possible because these devices often sit on internal networks. However, because ICE is designed for media sessions, devices might interact with external services or be reachable via external traffic in certain network setups, increasing the potential for remote reachability.

What are the first steps to secure my Poly Voice environment?

Start by identifying all Poly Voice devices in your network and determining if they have the Interactive Connectivity Establishment feature enabled. Once you have an inventory, evaluate the network accessibility of these units and coordinate with your vendor to monitor for available updates or guidance on feature configuration.

References

support.hp.com/us-en/document/ish_15052661-15052687-16/hpsbpy04083

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.