CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HCVE-2021-20093
Critical (9.1). EPSS 33% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 33% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
- CWE
- CWE-125
- Published
- Modified
- Record from
- the NVD, synced
Affected
- siemens:pss_cape
- 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