CVE-2021-33014

KUKA KR C4 - Use of Hard-Coded Credentials

HIGH

8.8

CVSS Score

Published: May 26, 2022 at 04:33 PM UTC

Updated: June 17, 2026 at 03:54 AM UTC

3 products affected across 1 vendorKr C4 FirmwareKssKr C4

Using KR C4 by KUKA?

Get instant alerts when new vulnerabilities affect KR C4 - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH8.8

Exploit prediction

EPSS 0.9%

SSVC

No known exploit

Description

An attacker can gain VxWorks Shell after login due to hard-coded credentials on a KUKA KR C4 control software for versions prior to 8.7 or any product running KSS.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Kr C4 Firmware · Kuka

95%

v < 8.7v < v8.7

Affected range stops below 8.7, so it looks safe — our inference, not a vendor statement

Affected range stops below v8.7, so it looks safe — our inference, not a vendor statement

kuka-kr-c4 (same device)

Kss · Kuka

95%

All versions

Kr C4 · Kukadevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISCThird Party AdvisoryUS Government Resource

Source: [email protected]

https://www.cisa.gov/uscert/ics/advisories/icsa-21-208-01

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHicscert

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-798

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card