CVE-2021-33016
CVE-2021-33016 is a critical-severity vulnerability in Kuka Kr C4 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (56th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-798
- Affected product: Kuka Kr C4 Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2021-33016?
- 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.
- How severe is CVE-2021-33016?
- CVE-2021-33016 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-33016 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-33016?
- CVE-2021-33016 primarily affects Kuka Kr C4 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-33016?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-33016 published?
- CVE-2021-33016 was published on 2022-05-26 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:o:kuka:kr_c4_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:kuka:kss:*:*:*:*:*:*:*:*
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