CVE-2021-33016 KUKA KR C4 - Use of Hard-Coded Credentials

Critical 9.8 Published 26 May 2022 Updated 16 Apr 2025

Attackers can gain full access to sensitive folders in KUKA KR C4 control software due to hard-coded credentials, requiring an upgrade to mitigate.

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-2021-33016?

CVE-2021-33016 is a critical vulnerability in KUKA KR C4, published on 26 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An attacker can gain full access (read/write/delete) to sensitive folders due to hard-coded credentials on KUKA KR C4 control software for versions prior to 8.7 or any product running KSS.

Weakness: CWE-798

Which versions are affected by CVE-2021-33016?

It affects 2 products.

Products include Kuka Kr C4 Firmware, Kuka Kss.

How do I fix CVE-2021-33016?

No fix has been published for CVE-2021-33016 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-33016 being exploited?

There is no known exploitation of CVE-2021-33016 in the wild and no public exploit code.

Sources

Also known as GHSA-pf82-6f4p-5p6c.