CVE-2021-20093
9.1
CRITICAL · CVSS 3.1 · EPSS 33.3% (pctl 98)
Patch early
EPSS 33.3% — above the 10% action threshold.
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.
Scoring
| CVSS | 9.1 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| EPSS | 33.3% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-125 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-06-16 |
| Last modified | 2026-06-17 |
Affected (11)
| Vendor | Product |
|---|---|
| siemens | pss cape |
| siemens | sicam 230 |
| siemens | sicam 230 firmware |
| siemens | simatic information server |
| siemens | simatic pcs neo |
| siemens | simatic process historian |
| siemens | simatic wincc oa |
| siemens | simit simulation platform |
| siemens | sinec infrastructure network services |
| siemens | sinema remote connect server |
| wibu | codemeter |
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
- 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
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