CVE-2019-9231: Audiocodes Mediant 500-Mbsr Firmware

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered on AudioCodes Mediant 500L-MSBR, 500-MBSR, M800B-MSBR and 800C-MSBR devices with firmware versions before 7.20A.202.307. A Cross-Site Request Forgery (CSRF) vulnerability in the management web interface allows remote attackers to execute malicious and unauthorized actions, because CSRFProtection=1 is not a default and is not documented.

Affected products

• Audiocodes Mediant 500-Mbsr Firmware: from f7.20a, before f7.20a.202.307 (fixed in f7.20a.202.307)
• Audiocodes Mediant 500l-Msbr Firmware: from f7.20a, before f7.20a.202.307 (fixed in f7.20a.202.307)
• Audiocodes Mediant 800c-Msbr Firmware: from f7.20a, before f7.20a.202.307 (fixed in f7.20a.202.307)
• Audiocodes Mediant m800b-Msbr Firmware: from f7.20a, before f7.20a.202.307 (fixed in f7.20a.202.307)

Published 2019-07-18. Last modified 2026-06-17.