CVEvulnerability

CVE-2020-5656

9.8 CRITICAL Published 2020-11-02 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-11-02
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P

Description

Improper access control vulnerability in TCP/IP function included in the firmware of MELSEC iQ-R series (RJ71EIP91 EtherNet/IP Network Interface Module First 2 digits of serial number are '02' or before, RJ71PN92 PROFINET IO Controller Module First 2 digits of serial number are '01' or before, RD81DL96 High Speed Data Logger Module First 2 digits of serial number are '08' or before, RD81MES96N MES Interface Module First 2 digits of serial number are '04' or before, and RD81OPC96 OPC UA Server Module First 2 digits of serial number are '04' or before) allows a remote unauthenticated attacker to stop the network functions of the products or execute a malicious program via a specially crafted packet.

Affected configurations

• mitsubishielectric melsec iq-rj71eip91 firmware • mitsubishielectric melsec iq-rj71pn92 firmware • mitsubishielectric melsec iq-rd81dl96 firmware • mitsubishielectric melsec iq-rd81mes96n firmware • mitsubishielectric melsec iq-rd81opc96 firmware

References