Evidence used
- No CISA KEV confirmation is currently recorded.
- The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
- EPSS is 1.32% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2022
CVE-2022-22517High confidence
Communication Components in multiple CODESYS products vulnerable to communication channel disruption
CODESYS · CODESYS Control RTE (SL)
7.5HighCVSS 3.1
Within 7 days
Fix not verifiedHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Restrict the affected network interface to trusted sources where business-safe.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs CODESYS CODESYS Control RTE (SL) and falls inside the recorded affected range.
- Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Fix not verified01
What, why and how
An unauthenticated, remote attacker can disrupt existing communication channels between CODESYS products by guessing a valid channel ID and injecting packets. This results in the communication channel to be closed.
What
An unauthenticated, remote attacker can disrupt existing communication channels between CODESYS products by guessing a valid channel ID and injecting packets. This results in the communication channel to be closed.
Why
The number of possible random values is smaller than needed by the product, making it more susceptible to brute force attacks.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
An unauthenticated, remote attacker can disrupt existing communication channels between CODESYS products by guessing a valid channel ID and injecting packets. This results in the communication channel to be closed.
Why
The number of possible random values is smaller than needed by the product, making it more susceptible to brute force attacks.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- a network path → Small Space of Random Values → cause the confidentiality, integrity or availability impact described by the vendor
- 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-334 ↗
CWE-334: Small Space of Random Values. The number of possible random values is smaller than needed by the product, making it more susceptible to brute force attacks.
- 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:N/I:N/A:HCommon 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.CNoneConfidentiality impact: No direct loss is represented by this metric.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.
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 not verified
- Affected
- CODESYS Control RTE (SL): V3.5.18.0 < V3.5.18.0
- CODESYS Control RTE (for Beckhoff CX) SL: V3.5.18.0 < V3.5.18.0
- CODESYS Control Win (SL): V3.5.18.0 < V3.5.18.0
- CODESYS Gateway: V3.5.18.0 < V3.5.18.0
- CODESYS Edge Gateway for Windows: V3.5.18.0 < V3.5.18.0
- CODESYS HMI (SL): V3.5.18.0 < V3.5.18.0
- CODESYS Development System V3: V3.5.18.0 < V3.5.18.0
- CODESYS Control Runtime System Toolkit: V3.5.18.0 < V3.5.18.0
- CODESYS Embedded Target Visu Toolkit: V3.5.18.0 < V3.5.18.0
- CODESYS Remote Target Visu Toolkit: V3.5.18.0 < V3.5.18.0
- CODESYS Control for BeagleBone SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for Beckhoff CX9020 SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for emPC-A/iMX6 SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for IOT2000 SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for Linux SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for PFC100 SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for PFC200 SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for PLCnext SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for Raspberry Pi SL: V4.5.0.0 < V4.5.0.0
- CODESYS Control for WAGO Touch Panels 600 SL: V4.5.0.0 < V4.5.0.0
- CODESYS Edge Gateway for Linux: V4.5.0.0 < V4.5.0.0
- CODESYS OPC DA Server SL: V3.5.18.0 < V3.5.18.0
- CODESYS PLCHandler: V3.5.18.0 < V3.5.18.0
- Fixed
- No fixed version is explicitly recorded in the structured CVE data.
- Action
- No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
- Workaround
- No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 7 Apr 2022 · Last source change 16 Sept 2024, 22:16 UTC · CWE-334 · Small Space of Random Values
CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2022-27663
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD modified after enrichment
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.
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.