Security readout for executives and security teams
Plain-English summary
CVE-2022-30791 is a denial-of-service issue in CODESYS V3. An unauthenticated network attacker can consume available TCP connection capacity so new connections are blocked. Existing connections are not affected, but operators or systems needing new sessions may lose access.
Executive priority
Treat as high priority for exposed OT environments. It does not indicate data theft or control manipulation, but loss of new connectivity to CODESYS components can disrupt operations, support access, and incident response.
Technical view
CmpBlkDrvTcp in multiple CODESYS V3 products has uncontrolled resource consumption, tracked as CWE-400. The CVSS 3.1 score is 7.5: network attack, low complexity, no privileges, no user interaction, and high availability impact only.
Likely exposure
Exposure is likely where affected CODESYS V3 components are network-reachable, especially gateways, HMIs, engineering stations, and PLC runtimes. The bundle lists many CODESYS Control SL runtimes, Gateway, Edge Gateway, Development System, HMI, and visualization/runtime toolkits.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Risk is still meaningful because the issue is unauthenticated, network-accessible, and affects availability of new TCP connections in industrial software environments.
Researcher notes
Evidence supports an availability-only resource exhaustion in CmpBlkDrvTcp across multiple CODESYS V3 products. The bundle does not include exploit status, proof-of-concept details, fixed version text, or product-specific configuration mitigations.
Mitigation direction
- Check CODESYS vendor guidance for affected and fixed versions.
- Restrict network access to CODESYS services and gateways.
- Place affected systems behind OT firewalls or allowlists.
- Prioritize updates for internet-exposed or cross-zone reachable systems.
- Monitor for repeated failed or saturated TCP connection patterns.
Validation and detection
- Inventory all CODESYS V3 components named in the advisory.
- Confirm exact product and version against CODESYS guidance.
- Identify exposed CODESYS TCP services across IT and OT networks.
- Verify segmentation prevents untrusted access to affected services.
- Review monitoring for connection exhaustion or blocked new sessions.
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.
CWE-400: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-30791 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=17128&token=bee4d8a57f19be289d623ec90135493b5f9179e3&download=CVE reference · x_refsource_CONFIRM
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.