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Full vulnerability report · 2021
CVE-2021-20093High confidence

A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a

Unknown · Wibu-Systems CodeMeter

Official source article: Siemens SSA-625850 ↗. Check the applicable product and release in the original source.

9.1CriticalCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

Critical technical impact with a remotely reachable, unauthenticated path and a public exploit reference; no CISA KEV confirmation is currently recorded. Verified remediation exists for at least one product or source, but 14 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityCriticalOperational priority:Critical, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 33.30% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown Wibu-Systems CodeMeter and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 14 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

3 current
SSA-625850 · CSAF 2.0 · revision 2 · finalSiemens ProductCERTSSA-625850: Multiple WIBU Systems CodeMeter Vulnerabilities Affecting the Desigo CC Product Family and SENTRON powermanager
4 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • Desigo CC family V5.0
  • Desigo CC family V5.1
  • Desigo CC family V6
  • SENTRON powermanager
Summary
A buffer over-read vulnerability in the CodeMeter Runtime network server could cause the server to return packets containing data from the heap. An unauthenticated remote attacker could exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server (i.e., CodeMeter.exe).
Remediation
Install the patch (available at https://support.industry.siemens.com/cs/ww/en/view/109825787/), which can be applied to all released versions
SCA-2022-0001 · CSAF 2.0 · revision 3 · finalSICK PSIRTVulnerability in SICK FieldEcho
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SICK FieldEcho <1.5.3
Summary
An attacker could send a specially crafted packet that could have the CodeMeter Runtime Network Server send back packets containing data from the heap or crash the server.
Remediation
Update to latest version
SSA-675303 · CSAF 2.0 · revision 4 · finalSiemens ProductCERTSSA-675303: WIBU Systems CodeMeter Runtime Vulnerabilities in Siemens Products
10 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • PSS(R)CAPE
  • SICAM 230
  • SIMATIC Information Server
  • SIMATIC PCS neo
  • SIMATIC Process Historian (incl. Process Historian OPC UA Server)
  • SIMATIC WinCC OA V3.17
  • SIMATIC WinCC OA V3.18
  • SIMIT Simulation Platform
  • SINEC INS
  • SINEMA Remote Connect Server
Summary
A buffer over-read vulnerability in the CodeMeter Runtime network server could cause the server to return packets containing data from the heap. An unauthenticated remote attacker could exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server (i.e., CodeMeter.exe).
Remediation
CAPE 14 installations installed from material dated 2021-06-16 or later are not affected, as they contain a fixed version of CodeMeter Runtime.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-7550

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

Critical technical impact with a remotely reachable, unauthenticated path and a public exploit reference; no CISA KEV confirmation is currently recorded. Verified remediation exists for at least one product or source, but 14 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

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.

What

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

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

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

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Out-of-bounds Read → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-125Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Cyber Security Agency of Singapore · English · CSA-SB-20210623Security Bulletin 23 Jun 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 23 Jun 2021, published on 23 June 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0935Multiples vulnérabilités dans les produits Siemens

d?id=CVE-2019-12258 Référence CVE CVE-2019-12259 https://www.cve.org/CVERecord?id=CVE-2019-12259 Référence CVE CVE-2019-12260 https://www.cve.org/CVERecord?id=CVE-2019-12260 Référence CVE CVE-2019-12261 https://www.cve.org/CVERecord?id=CVE-2019-12261 Référence CVE CVE-2019-12262 https://www.cve.org/CVERecord?id=CVE-2019-12262 Référence CVE CVE-2019-12263 https://www.cve.org/CVERecord?id=CVE-2019-12263 Référence CVE CVE-2019-12265 https://www.cve.org/CVERecord?id=CVE-2019-12265 Référence CVE CVE-2020-25020 https://www.cve.org/CVERecord?id=CVE-2020-25020 Référence CVE CVE-2020-35460 https://www.cve.org/CVERecord?id=CVE-2020-35460 Référence CVE CVE-2021-20093 https://www.cve.org/CVERecord?id=CVE-2021-20093 Référence CVE CVE-2021-20094 https://www.cve.org/CVERecord?id=CVE-2021-20094 Référence CVE CVE-2022-23095 https://www.cve.org/CVERecord?id=CVE-2022-23095 Référence CVE CVE-2022-23218 https://www.cve.org/CVERecord?id=CVE-2022-23218 Référence CVE CVE-2022-23219 https://www.cve.org/CVERecord?id=CVE-2022-23219 Référence CVE CVE-2022-28807 https://www.cve.org/CVERecord?id=CVE-2022-28807 Référence CVE CVE-2022-28808 https://www.cve.org/CVERecord?id=CVE-2022-28808 Référence CVE CVE-2022-28809 https://www.cve.org/CVERecord?id=CVE-2022-28809 Référence CVE CVE-2022-30184 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2022-AVI-124Multiples vulnérabilités dans les produits Siemens

ERecord?id=CVE-2020-26143 Référence CVE CVE-2020-26144 https://www.cve.org/CVERecord?id=CVE-2020-26144 Référence CVE CVE-2020-26145 https://www.cve.org/CVERecord?id=CVE-2020-26145 Référence CVE CVE-2020-26146 https://www.cve.org/CVERecord?id=CVE-2020-26146 Référence CVE CVE-2020-26147 https://www.cve.org/CVERecord?id=CVE-2020-26147 Référence CVE CVE-2020-28400 https://www.cve.org/CVERecord?id=CVE-2020-28400 Référence CVE CVE-2020-8670 https://www.cve.org/CVERecord?id=CVE-2020-8670 Référence CVE CVE-2020-8703 https://www.cve.org/CVERecord?id=CVE-2020-8703 Référence CVE CVE-2020-8704 https://www.cve.org/CVERecord?id=CVE-2020-8704 Référence CVE CVE-2021-20093 https://www.cve.org/CVERecord?id=CVE-2021-20093 Référence CVE CVE-2021-20094 https://www.cve.org/CVERecord?id=CVE-2021-20094 Référence CVE CVE-2021-3449 https://www.cve.org/CVERecord?id=CVE-2021-3449 Référence CVE CVE-2021-3712 https://www.cve.org/CVERecord?id=CVE-2021-3712 Référence CVE CVE-2021-37185 https://www.cve.org/CVERecord?id=CVE-2021-37185 Référence CVE CVE-2021-37186 https://www.cve.org/CVERecord?id=CVE-2021-37186 Référence CVE CVE-2021-37194 https://www.cve.org/CVERecord?id=CVE-2021-37194 Référence CVE CVE-2021-37195 https://www.cve.org/CVERecord?id=CVE-2021-37195 Référence CVE CVE-2021-37196 https://www.cve.org/CVERecord?id=CVE-

Official advisory ↗
CERT-FR · French · CERTFR-2021-AVI-518Multiples vulnérabilités dans les produits Siemens

2220.pdf Bulletin de sécurité Siemens ssa-913875 du 13 juillet 2021 https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf Bulletin de sécurité Siemens ssa-941426 du 13 juillet 2021 https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf Référence CVE CVE-2015-8011 https://www.cve.org/CVERecord?id=CVE-2015-8011 Référence CVE CVE-2020-15782 https://www.cve.org/CVERecord?id=CVE-2020-15782 Référence CVE CVE-2020-26147 https://www.cve.org/CVERecord?id=CVE-2020-26147 Référence CVE CVE-2020-27827 https://www.cve.org/CVERecord?id=CVE-2020-27827 Référence CVE CVE-2020-28400 https://www.cve.org/CVERecord?id=CVE-2020-28400 Référence CVE CVE-2021-20093 https://www.cve.org/CVERecord?id=CVE-2021-20093 Référence CVE CVE-2021-20094 https://www.cve.org/CVERecord?id=CVE-2021-20094 Référence CVE CVE-2021-25671 https://www.cve.org/CVERecord?id=CVE-2021-25671 Référence CVE CVE-2021-29998 https://www.cve.org/CVERecord?id=CVE-2021-29998 Référence CVE CVE-2021-31892 https://www.cve.org/CVERecord?id=CVE-2021-31892 Référence CVE CVE-2021-31893 https://www.cve.org/CVERecord?id=CVE-2021-31893 Référence CVE CVE-2021-31894 https://www.cve.org/CVERecord?id=CVE-2021-31894 Référence CVE CVE-2021-31895 https://www.cve.org/CVERecord?id=CVE-2021-31895 Référence CVE CVE-2021-33709 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-002247Wibu-Systems CodeMeter における境界外読み取りに関する脆弱性

Wibu-Systems CodeMeter には、境界外読み取りに関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
Update to latest version
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
04

Evidence and provenance

Published 16 Jun 2021 · Last source change 3 Aug 2024, 17:30 UTC · CWE-125 · Out-of-bounds Read

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-7550
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    < 7.21a · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    < 7.21a · Fixed: Update to latest version
    SICK PSIRT ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added remediation: sick.com/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf; removed remediation: cdn.wibu.com/Advisory_WIBU-210423-01.pdf.
    Before
    remediation: cdn.wibu.com/Advisory_WIBU-210423-01.pdf
    After
    remediation: sick.com/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
    SICK PSIRT ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-20093 · cve.blacktree.nl