CVE-2026-2329 — Critical VoIP RCE
Affects: Grandstream GXP1600
Type: Stack-based buffer overflow
Impact: Unauthenticated RCE (root)

Attack Path:
• Extract SIP credentials
• Modify SIP proxy settings
• Transparent call interception

Operational risk:
• SMB exposure
• Flat networks
• Insufficient VoIP monitoring

Patch available: Firmware 1.0.7.81.
Community question:
Are you incorporating VoIP firmware into vulnerability scanning pipelines?

Do you log and monitor SIP configuration changes?

Source: https://www.securityweek.com/critical-grandstream-phone-vulnerability-exposes-calls-to-interception/

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