Security readout for executives and security teams
Plain-English summary
KUKA robot controllers using KR C4 control software or KSS can contain hard-coded credentials. A logged-in attacker could use them to reach the VxWorks Shell, creating serious risk to controller confidentiality, integrity, and availability in industrial environments.
Executive priority
Prioritize remediation for production robot cells where controller compromise could disrupt safety, manufacturing availability, or process integrity. Treat this as a high-risk OT exposure, not a routine IT credential issue.
Technical view
CVE-2021-33014 is CWE-798 in KUKA KR C4/KSS. The bundle describes hard-coded credentials allowing VxWorks Shell access after login. CVSS 3.1 is 8.8: network attack vector, low complexity, low privileges, no user interaction, and high CIA impact.
Likely exposure
Exposure is most relevant to sites operating KUKA KR C4 controllers or products running KSS, particularly where controller management interfaces are reachable from plant networks or remote access paths.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The CVSS vector indicates exploitation requires network access and low privileges, but no user interaction.
Researcher notes
Evidence is limited to the CVE bundle and CISA advisory reference. Do not assume internet exposure, exploit publication, or active exploitation without additional sources. Validation should focus on version confirmation, network reachability, and access-control review.
Mitigation direction
- Check the CISA advisory and KUKA guidance for supported upgrade paths.
- Upgrade affected KR C4/KSS software to version 8.7 or later where applicable.
- Restrict network access to robot controllers and management services.
- Limit controller login access to authorized operational staff only.
- Monitor controller access logs for unexpected shell or administrative activity.
Validation and detection
- Inventory KUKA KR C4 controllers and systems running KSS.
- Confirm installed KSS/control software versions against vendor guidance.
- Verify controller management access is segmented from enterprise networks.
- Review accounts with controller login privileges.
- Check logs for unexpected administrative sessions or shell access.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-798: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-33014 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-208-01CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use of Hard-coded Credentials
Use of Hard-coded Credentials represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.