Out-of-bounds read in Wibu-Systems CodeMeter
Priority MEDIUM 64CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.33304 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Wibu-Systems CodeMeter: 7.21a
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Wibu-Systems CodeMeter | before 7.21a | 7.21a | Patch available | CNA |
- Wibu-Systems CodeMeter Vendor— Affected before 7.21a Fixed in 7.21a Patch available CNA
CPE configurations NVD · 18
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:wibu:codemeter:*:*:*:*:*:*:*:* | up to 7.21a | Vulnerable | Wibu |
| cpe:2.3:a:siemens:pss_cape:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Siemens |
| cpe:2.3:o:siemens:sicam_230_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:h:siemens:sicam_230:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:a:siemens:simatic_information_server:2019:sp1:*:*:*:*:*:* | 2019 sp1 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:simatic_information_server:2020:-:*:*:*:*:*:* | 2020 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:simatic_pcs_neo:*:*:*:*:*:*:*:* | before 3.1 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:simatic_wincc_oa:3.17:-:*:*:*:*:*:* | 3.17 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:simatic_wincc_oa:3.18:-:*:*:*:*:*:* | 3.18 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:simit_simulation_platform:*:*:*:*:*:*:*:* | 10.0 to before 10.3 | Vulnerable | Siemens |
- cpe:2.3:a:wibu:codemeter:*:*:*:*:*:*:*:* Versions up to 7.21a Vulnerable ·Wibu
- cpe:2.3:a:siemens:pss_cape:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Siemens
- cpe:2.3:o:siemens:sicam_230_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:h:siemens:sicam_230:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:a:siemens:simatic_information_server:2019:sp1:*:*:*:*:*:* Versions 2019 sp1 Vulnerable ·Siemens
- cpe:2.3:a:siemens:simatic_information_server:2020:-:*:*:*:*:*:* Versions 2020 Vulnerable ·Siemens
- cpe:2.3:a:siemens:simatic_pcs_neo:*:*:*:*:*:*:*:* Versions before 3.1 Vulnerable ·Siemens
- cpe:2.3:a:siemens:simatic_wincc_oa:3.17:-:*:*:*:*:*:* Versions 3.17 Vulnerable ·Siemens
- cpe:2.3:a:siemens:simatic_wincc_oa:3.18:-:*:*:*:*:*:* Versions 3.18 Vulnerable ·Siemens
- cpe:2.3:a:siemens:simit_simulation_platform:*:*:*:*:*:*:*:* Versions 10.0 to before 10.3 Vulnerable ·Siemens
Show 8 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:siemens:simit_simulation_platform:10.3:-:*:*:*:*:*:* | 10.3 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* | before 1.0.1.1 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sinec_infrastructure_network_services:1.0.1:-:*:*:*:*:*:* | 1.0.1 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:* | before 3.0 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sinema_remote_connect_server:3.0:-:*:*:*:*:*:* | 3.0 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:sinema_remote_connect_server:3.0:sp1:*:*:*:*:*:* | 3.0 sp1 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_process_historian:*:*:*:*:*:*:*:* | 2019 to before 2020 | Vulnerable | Siemens |
| cpe:2.3:h:siemens:simatic_process_historian:2020:-:*:*:*:*:*:* | 2020 | Vulnerable | Siemens |
- cpe:2.3:a:siemens:simit_simulation_platform:10.3:-:*:*:*:*:*:* Versions 10.3 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* Versions before 1.0.1.1 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sinec_infrastructure_network_services:1.0.1:-:*:*:*:*:*:* Versions 1.0.1 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:* Versions before 3.0 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sinema_remote_connect_server:3.0:-:*:*:*:*:*:* Versions 3.0 Vulnerable ·Siemens
- cpe:2.3:a:siemens:sinema_remote_connect_server:3.0:sp1:*:*:*:*:*:* Versions 3.0 sp1 Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_process_historian:*:*:*:*:*:*:*:* Versions 2019 to before 2020 Vulnerable ·Siemens
- cpe:2.3:h:siemens:simatic_process_historian:2020:-:*:*:*:*:*:* Versions 2020 Vulnerable ·Siemens
Remediation
- Fix · CNA Wibu-Systems CodeMeter Fixed in 7.21a
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20093
- 2026-10-03 Alias added: GHSA-m5xx-rgqg-j2m6
References
Sources
- CVE-2021-20093 · CVE Program
- CVE-2021-20093 · NVD
- FIRST EPSS
- GHSA-m5xx-rgqg-j2m6 · GitHub Advisory Database · CC BY 4.0
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