CVE-2021-33016 - CVE House
Back to Database
Status published Critical CVE-2021-33016

KUKA KR C4 - Use of Hard-Coded Credentials

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-33016

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Chen Jie from NSFOCUS reported these vulnerabilities to CISA.

References

More from KUKA

View All →
CVE-2022-2242
KUKA V/KSS WoV SH access control vulnerability
Critical 9.8
CVE-2021-33014
KUKA KR C4 - Use of Hard-Coded Credentials
High 8.8
CVE-2020-10635
ICSA-20-098-05 KUKA.Sim Pro Improper Enforcement of Message Integrity During Transmission in a Communication Channel
Medium 4.3

Affected Vendor

Affected Software

KR C4, KSS (KUKA.SystemSoftware)
Vulnerable Versions:
All

Timeline

Official Publish: May 26th, 2022
Last Modified: April 16th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-798

MITRE ATT&CK TTPs

T1552 Unsecured Credentials
Credential Access
T1078 Valid Accounts
Persistence
T1021 Remote Services
Lateral Movement
T1190 Exploit Public-Facing Application
Initial Access
T1098 Account Manipulation
Privilege Escalation