CVE-2021-20093
CRITICAL
9.1
CVSS Score
Published: June 16, 2021 at 11:09 AM UTC
Updated: June 17, 2026 at 03:33 AM UTC
12 products affected across 2 vendorsSINEMA Remote Connect ServerSinec Infrastructure Network ServicesSIMATIC PCS neo
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Severity
CRITICAL9.1
Exploit prediction
EPSS 33%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 3.1
Affected range stops below 3.1, so it looks safe — our inference, not a vendor statement
2019 ≤ v < 20202020
Affected range stops below 2020, so it looks safe — our inference, not a vendor statement
10.0 ≤ v < 10.310.3
Affected range stops below 10.3, so it looks safe — our inference, not a vendor statement
v < 1.0.1.11.0.1
Affected range stops below 1.0.1.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
x_refsource_MISCMitigationVendor Advisory
Source: [email protected]
https://cdn.wibu.com/fileadmin/wibu_downloads/security_advisories/Advisory_WIBU-210423-01.pdfx_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdfx_refsource_MISCThird Party AdvisoryUS Government Resource
Source: [email protected]
https://us-cert.cisa.gov/ics/advisories/icsa-21-210-02x_refsource_MISCExploitPatchThird Party Advisory
Source: [email protected]
https://www.tenable.com/security/research/tra-2021-24CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-125
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