CVE-2021-20093
CVE-2021-20093 is a critical-severity vulnerability in Wibu Codemeter with a CVSS 3.x base score of 9.1. Its EPSS exploit-prediction score of 33% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-125.
Key facts
- Severity: Critical (CVSS 3.x base score 9.1)
- CVSS v2: 6.4
- EPSS exploit prediction: 33% (98th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-125
- Affected product: Wibu Codemeter
- Published:
- Last modified:
Description
A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.
Frequently asked questions
- What is CVE-2021-20093?
- A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.
- How severe is CVE-2021-20093?
- CVE-2021-20093 has a CVSS 3.x base score of 9.1, 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 none, and availability high.
- Is CVE-2021-20093 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 33% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-20093?
- CVE-2021-20093 primarily affects Wibu Codemeter. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-20093?
- 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-2021-20093 published?
- CVE-2021-20093 was published on 2021-06-16 and last updated on 2026-06-17.
References
- https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02
- https://www.tenable.com/security/research/tra-2021-24
Affected products (17)
- cpe:2.3:a:wibu:codemeter:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:pss_cape:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:sicam_230_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_information_server:2019:sp1:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_information_server:2020:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_pcs_neo:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_oa:3.17:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simatic_wincc_oa:3.18:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:simit_simulation_platform:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:simit_simulation_platform:10.3:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:sinec_infrastructure_network_services:1.0.1:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:*
- cpe:2.3:a:siemens:sinema_remote_connect_server:3.0:-:*:*:*:*:*:*
- cpe:2.3:a:siemens:sinema_remote_connect_server:3.0:sp1:*:*:*:*:*:*
- cpe:2.3:h:siemens:simatic_process_historian:*:*:*:*:*:*:*:*
- cpe:2.3:h:siemens:simatic_process_historian:2020:-:*:*:*:*:*:*
More vulnerabilities in Wibu Codemeter
- CVE-2020-14517 — Critical (CVSS 9.8): Protocol encryption can be easily broken for CodeMeter (All versions prior to 6.90 are affected, including Version 6.90…
- CVE-2020-14509 — Critical (CVSS 9.8): Multiple memory corruption vulnerabilities exist in CodeMeter (All versions prior to 7.10) where the packet parser…
- CVE-2021-20094 — High (CVSS 7.5): A denial of service vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker…
- CVE-2020-16233 — High (CVSS 7.5): An attacker could send a specially crafted packet that could have CodeMeter (All versions prior to 7.10) send back…
- CVE-2020-14519 — High (CVSS 7.5): This vulnerability allows an attacker to use the internal WebSockets API for CodeMeter (All versions prior to 7.00 are…
- CVE-2020-14515 — High (CVSS 7.5): CodeMeter (All versions prior to 6.90 when using CmActLicense update files with CmActLicense Firm Code) has an issue in…
All CVEs affecting Wibu Codemeter →
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