CVE-2021-42539 Emerson WirelessHART Gateway

High 8.0 Published 22 Oct 2021 Updated 16 Sep 2024

Attackers can restore system backups without permission validation, leading to account takeover and unauthorized settings changes in Emerson WirelessHART Gateways.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-42539?

CVE-2021-42539 is a high-severity missing authorization vulnerability in Emerson WirelessHART Gateway, published on 22 Oct 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

The affected product is vulnerable to a missing permission validation on system backup restore, which could lead to account take over and unapproved settings change.

Weakness: CWE-306

Which versions are affected by CVE-2021-42539?

It affects 3 products.

Products include Emerson Wireless 1410 Gateway Firmware, Emerson Wireless 1410d Gateway Firmware, Emerson Wireless 1420 Gateway Firmware.

How do I fix CVE-2021-42539?

No fix has been published for CVE-2021-42539 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-42539 being exploited?

There is no known exploitation of CVE-2021-42539 in the wild and no public exploit code.

Sources

Also known as GHSA-m82f-xpch-cx55.