CVE-2020-5545 Auth bypass in Mitsubishi Electric MELQIC IU1 series

Critical 9.8 Published 16 Mar 2020 Updated 4 Aug 2024

Remote attackers can bypass access restrictions to stop network functions or execute malware on Mitsubishi MELQIC IU1 devices via crafted packets.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-5545?

CVE-2020-5545 is a critical authentication bypass vulnerability in Mitsubishi Electric MELQIC IU1 series, published on 16 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

TCP function included in the firmware of Mitsubishi Electric MELQIC IU1 series IU1-1M20-D firmware version 1.0.7 and earlier allows remote attackers to bypass access restriction and to stop the network functions or execute malware via a specially crafted packet.

Which versions are affected by CVE-2020-5545?

It affects 1 product.

Products include Mitsubishielectric Iu1-1m20-D Firmware.

How do I fix CVE-2020-5545?

No fix has been published for CVE-2020-5545 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-5545 being exploited?

There is no known exploitation of CVE-2020-5545 in the wild and no public exploit code.

Sources

Also known as GHSA-rq76-63qg-qhfw.