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Vulnerability · Published Oct 30, 2020 · Assigned by jpcert

CVE-2020-5653

Critical 9.8

In plain English

A critical-severity security flaw in MELSEC iQ-R series from Mitsubishi Electric Corporation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.2% (higher than 88% of all known vulnerabilities).

Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)3.2%top 11.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

Buffer overflow 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 products (as reported)

VendorProductVersions
Mitsubishi Electric Corporation 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

References