Security readout for executives and security teams
Plain-English summary
CVE-2021-30194 is an out-of-bounds read in CODESYS V2 Web-Server versions before 1.1.9.20. In business terms, exposed industrial web-server components may mishandle memory reads. The public source bundle does not provide CVSS, exploit status, affected CPEs, or operational impact details.
Executive priority
Treat as an exposure-identification task first. The affected component is industrial software, but public evidence here is too limited to rank urgency above confirmed exploited or scored vulnerabilities.
Technical view
The CVE record describes an out-of-bounds read in CODESYS V2 Web-Server before 1.1.9.20. No CWE, CVSS vector, exploit prerequisites, affected product matrix, or proof of exploitation is provided in the source bundle. The version boundary is the main actionable technical detail.
Likely exposure
Exposure is likely limited to environments running CODESYS V2 Web-Server earlier than 1.1.9.20. The source bundle does not identify specific CPEs, deployment modes, or downstream OEM products.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation. Public details here do not describe attacker access requirements, payloads, or exploit maturity.
Researcher notes
Key gaps are CVSS, CWE, affected CPEs, exploit prerequisites, and downstream product mapping. Avoid assuming impact beyond out-of-bounds read unless CODESYS advisory details confirm it.
Mitigation direction
- Inventory CODESYS V2 Web-Server deployments and record exact versions.
- Check CODESYS vendor guidance for CVE-2021-30194 and applicable updates.
- Upgrade deployments earlier than 1.1.9.20 where vendor guidance confirms applicability.
- Restrict network access to affected web-server interfaces until remediation is confirmed.
Validation and detection
- Confirm whether CODESYS V2 Web-Server is present in OT and engineering environments.
- Verify running versions against the before-1.1.9.20 affected boundary.
- Review CODESYS customer advisory material for product-specific applicability.
- Check internet-facing and internal exposure of web-server management interfaces.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-30194 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://customers.codesys.com/index.phpCVE reference · x_refsource_MISC
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14726&token=553da5d11234bbe1ceed59969d419a71bb8c8747&download=CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.