CVE-2026-0826: HP Poly VVX VoIP RCE — Detection, Hardening, and Response

---
title: HP Poly VoIP - Potential SDP Buffer Overflow Crash
id: 9a8b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects potential buffer overflow crashes in HP Poly VVX phones indicated by service restarts or kernel panics in syslog.
references:
 - https://www.rapid7.com/blog/post/ve-cve-2026-0826-critical-unauthenticated-stack-buffer-overflow-hp-poly-vvx-trio-voip-phones-fixed
author: Security Arsenal
date: 2026/04/06
tags:
 - attack.initial_access
 - attack.t1190
logsource:
 product: linux
 service: syslog
detection:
 selection:
   process|contains:
     - 'sip'
     - 'polycom'
     - 'vvx'
   message|contains:
     - 'kernel panic'
     - 'segfault'
     - 'restart'
     - 'reboot'
 condition: selection
falsepositives:
  - Legitimate device crashes due to firmware bugs or power issues
level: high
---
title: Suspicious SIP INVITE with ICE Attributes
id: 1a2b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects SIP INVITE messages containing ICE attributes which may indicate probing or exploitation attempts against CVE-2026-0826.
references:
 - https://www.rapid7.com/blog/post/ve-cve-2026-0826-critical-unauthenticated-stack-buffer-overflow-hp-poly-vvx-trio-voip-phones-fixed
author: Security Arsenal
date: 2026/04/06
tags:
 - attack.initial_access
 - attack.t1190
logsource:
 category: network
detection:
 selection:
   protocol|contains: 'sip'
   request.method|contains: 'INVITE'
   payload|contains: 'a=ice'
 condition: selection
falsepositives:
  - Legitimate WebRTC or SIP calls utilizing ICE for NAT traversal
level: medium

// Hunt for SIP INVITE with ICE attributes and subsequent device anomalies
let TimeRange = 1h;
let DeviceIPPrefix = "10.0.0."; // Update to match your VoIP subnet
Syslog
| where TimeGenerated > ago(TimeRange)
| where SyslogMessage has "SIP" and SyslogMessage has "INVITE"
| where SyslogMessage has "a=ice"
| extend SourceIP = extract(@"Source\s*:\s*([\d\.]+)", 1, SyslogMessage)
| project TimeGenerated, Computer, SourceIP, SyslogMessage
| join kind=inner (
    Syslog
    | where TimeGenerated > ago(TimeRange)
    | where SyslogMessage has_any ("restart", "panic", "segfault", "fatal")
    | where Computer has_any ("poly", "vvx")
) on Computer
| project TimeGenerated1, Computer, SourceIP, AlertMessage = SyslogMessage1, CrashMessage = SyslogMessage
| order by TimeGenerated1 desc

-- Hunt for active SIP connections and locate Poly configuration files
SELECT 
  F.Name AS ConfigFile,
  F.Size AS FileSize,
  F.ModTime AS LastModified
FROM glob(globs='/data/**/*cfg', root='/') 
WHERE Name =~ 'poly' OR Name =~ 'vvx'

SELECT 
  PID, 
  Name, 
  Laddr.IP AS LocalIP, 
  Laddr.Port AS LocalPort, 
  Raddr.IP AS RemoteIP, 
  Raddr.Port AS RemotePort, 
  State
FROM netstat()
WHERE LocalPort IN (5060, 5061) OR RemotePort IN (5060, 5061)

#!/bin/bash

# Audit script for CVE-2026-0826 - HP Poly VVX ICE Configuration
# This script scans for common Poly configuration locations to check ICE status

echo "[*] Scanning for Poly configuration files..."

# Common paths for Poly VVX config files (adjust based on your deployment)
CONFIG_PATHS=("/flash/polycom_config/" "/data/polycom/" "/etc/phone/")

FOUND_VULN=0

for path in "${CONFIG_PATHS[@]}"; do
  if [ -d "$path" ]; then
    echo "[+] Checking directory: $path"
    # Look for ICE enabled in config files
    if grep -rq "feature\.ice\.enabled.*1" "$path"; then
      echo "[!] WARNING: ICE feature appears ENABLED in $path"
      grep -rn "feature\.ice\.enabled.*1" "$path"
      FOUND_VULN=1
    else
      echo "[-] ICE feature appears disabled or not configured in $path"
    fi
  fi
done

if [ "$FOUND_VULN" -eq 1 ]; then
  echo "[!] ACTION REQUIRED: CVE-2026-0826 Risk Detected."
  echo "[!] 1. Apply latest HP Poly Firmware immediately."
  echo "[!] 2. Disable ICE if not required via provisioning server."
else
  echo "[+] No immediate indicators of ICE misconfiguration found on local filesystem."
fi