Codesys Modbus
Monthly
TCP connection exhaustion in CODESYS Modbus TCP Server allows remote unauthenticated attackers to trigger a race condition in connection handling, depleting all available TCP connections and denying service to legitimate industrial automation clients. CVSS 8.2 (High) reflects high availability impact. No active exploitation confirmed (not in CISA KEV), but attack complexity is low with present race condition opportunity (AT:P). Patch available from vendor for versions prior to 4.6.0.0.
TCP connection exhaustion in CODESYS Modbus TCP Server allows remote unauthenticated attackers to trigger a race condition in connection handling, depleting all available TCP connections and denying service to legitimate industrial automation clients. CVSS 8.2 (High) reflects high availability impact. No active exploitation confirmed (not in CISA KEV), but attack complexity is low with present race condition opportunity (AT:P). Patch available from vendor for versions prior to 4.6.0.0.