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Fencer Intel
high 7.5

CVE-2022-30791 json

CODESYS V3: CmpBlkDrvTcp allows unauthenticated attackers to block all its available TCP connections

published 4y ago modified 4mo ago also EUVD-2022-52614

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

In CmpBlkDrvTcp of CODESYS V3 in multiple versions an uncontrolled ressource consumption allows an unauthorized attacker to block new TCP connections. Existing connections are not affected.

Patch / fix

  • CODESYS CODESYS Control RTE (SL) V3.5.18.20
  • CODESYS CODESYS Control RTE (for Beckhoff CX) SL V3.5.18.20
  • CODESYS CODESYS Control Win (SL) V3.5.18.20
  • CODESYS CODESYS Gateway V3.5.18.20
  • CODESYS CODESYS Edge Gateway for Windows V3.5.18.20
  • CODESYS CODESYS HMI (SL) V3.5.18.20
  • CODESYS CODESYS Development System V3 V3.5.18.10
  • CODESYS CODESYS Control Runtime System Toolkit V3.5.18.20
  • CODESYS CODESYS Embedded Target Visu Toolkit V3.5.18.20
  • CODESYS CODESYS Remote Target Visu Toolkit V3.5.18.20
  • CODESYS CODESYS Control for BeagleBone SL V4.5.0.0
  • CODESYS CODESYS Control for Beckhoff CX9020 SL V4.5.0.0
  • CODESYS CODESYS Control for emPC-A/iMX6 SL V4.5.0.0
  • CODESYS CODESYS Control for IOT2000 SL V4.5.0.0
  • CODESYS CODESYS Control for Linux SL V4.5.0.0
  • CODESYS CODESYS Control for PFC100 SL V4.5.0.0
  • CODESYS CODESYS Control for PFC200 SL V4.5.0.0
  • CODESYS CODESYS Control for PLCnext SL V4.5.0.0
  • CODESYS CODESYS Control for Raspberry Pi SL V4.5.0.0
  • CODESYS CODESYS Control for WAGO Touch Panels 600 SL V4.5.0.0
  • CODESYS CODESYS Edge Gateway for Linux V4.5.0.0

Is CVE-2022-30791 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-076-01 updated cvss 7.5

CODESYS in Festo Automation Suite

  • CODESYS Development System 3.0 Festo Automation Suite 2.8.0.137, Festo Automation Suite < 2.8.0.138 CODESYS Development System 3.5.16.10 Festo Automation Suite 2.8.0.137, Festo Automation Suite < 2.8.0.138
    affected: mitigation
  • Festo Automation Suite 2.8.0.138 CODESYS Development System 3.5.21.20
    fixed

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • CODESYS CODESYS Control RTE (SL)
  • CODESYS CODESYS Control RTE (for Beckhoff CX) SL
  • CODESYS CODESYS Control Win (SL)
  • CODESYS CODESYS Gateway
  • CODESYS CODESYS Edge Gateway for Windows
  • CODESYS CODESYS HMI (SL)
  • CODESYS CODESYS Development System V3
  • CODESYS CODESYS Control Runtime System Toolkit
  • CODESYS CODESYS Embedded Target Visu Toolkit
  • CODESYS CODESYS Remote Target Visu Toolkit
  • CODESYS CODESYS Control for BeagleBone SL
  • CODESYS CODESYS Control for Beckhoff CX9020 SL
  • CODESYS CODESYS Control for emPC-A/iMX6 SL
  • CODESYS CODESYS Control for IOT2000 SL
  • CODESYS CODESYS Control for Linux SL
  • CODESYS CODESYS Control for PFC100 SL
  • CODESYS CODESYS Control for PFC200 SL
  • CODESYS CODESYS Control for PLCnext SL
  • CODESYS CODESYS Control for Raspberry Pi SL
  • CODESYS CODESYS Control for WAGO Touch Panels 600 SL
  • CODESYS CODESYS Edge Gateway for Linux

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.