No exploitation reported

CVE-2019-5105

Q: Is CVE-2019-5105 actively exploited?

Active exploitation of CVE-2019-5105 has not been confirmed. Its EPSS score was 2.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-5105?

CVE-2019-5105 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2020-03-26
WeaknessCWE-119 · CWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An exploitable memory corruption vulnerability exists in the Name Service Client functionality of 3S-Smart Software Solutions CODESYS GatewayService. A specially crafted packet can cause a large memcpy, resulting in an access violation and termination of the process. An attacker can send a packet to a device running the GatewayService.exe to trigger this vulnerability. All variants of the CODESYS V3 products in all versions prior V3.5.16.10 containing the CmpRouter or CmpRouterEmbedded component are affected, regardless of the CPU type or operating system: CODESYS Control for BeagleBone, CODESYS Control for emPC-A/iMX6, CODESYS Control for IOT2000, CODESYS Control for Linux, CODESYS Control for PLCnext, CODESYS Control for PFC100, CODESYS Control for PFC200, CODESYS Control for Raspberry Pi, CODESYS Control RTE V3, CODESYS Control RTE V3 (for Beckhoff CX), CODESYS Control Win V3 (also part of the CODESYS Development System setup), CODESYS Control V3 Runtime System Toolkit, CODESYS V3 Embedded Target Visu Toolkit, CODESYS V3 Remote Target Visu Toolkit, CODESYS V3 Safety SIL2, CODESYS Edge Gateway V3, CODESYS Gateway V3, CODESYS HMI V3, CODESYS OPC Server V3, CODESYS PLCHandler SDK, CODESYS V3 Simulation Runtime (part of the CODESYS Development System).

Timeline

dates in UTC

2020-03-2615:15CVE publishedNVD

Versions per branch

NVD

Codesys

Branch	Affected	Fixed in	Source
3.5	= 3.5.13.2	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-26-076-01 CISA1 product fixed · 4 known affected
CODESYS in Festo Automation Suite
Festo Automation Suite <2.8.0.138 installed with CODESYS Development System 3.0 · Festo Automation Suite <2.8.0.138 installed with CODESYS Development System 3.5.16.10 · Festo Automation Suite 2.8.0.137 installed with CODESYS Development System 3.0 · +1 more
ICSA-25-273-04 CISA4 known affected
Festo Controller CECC-S,-LK,-D Family Firmware (Update A)
Festo Festo Firmware (R05 (17.06.2016) = 2.3.8.0) installed on Festo Hardware Controller CECC-D (All versions): vers:all/* · Festo Festo Firmware (R06 (11.10.2016) = 2.3.8.1) installed on Festo Hardware Controller CECC-LK (All versions): vers:all/* · Festo Festo Firmware (R05 (17.06.2016) = 2.3.8.0) installed on Festo Hardware Controller CECC-S (All versions): vers:all/* · +1 more

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-26-076-01 · 4 productsStarting from Festo Automation Suite version 2.8.0.138, Codesys is no longer bundled with the suite and must be downloaded and installed separately by the customer. To mitigate this vulnerability customers are advised to: Download the latest, patched version of Codesys directly from the official…
Mitigation from the vendor CISA ICSA-25-273-04 · 6 productsFesto has identified the following specific workarounds and mitigations users can apply to reduce risk:
Mitigation from the vendor CISA ICSA-25-273-04 · 6 products(CVE-2020-12068, CVE-2022-22515, CVE-2022-22514, CVE-2022-22513, CVE-2021-36763, CVE-2021-33485, CVE-2020-10245, CVE-2020-15806, CVE-2019-9011, CVE-2019-9013, CVE-2020-12067, CVE-2020-12069, CVE-2021-36764, CVE-2019-5105, CVE-2021-29241, CVE-2021-29242, CVE-2022-22519, CVE-2022-22517, CVE-2018-0739…
Mitigation from the vendor CISA ICSA-25-273-04 · 6 productsThe following product versions have been fixed:
Mitigation from the vendor CISA ICSA-25-273-04 · 6 productsFor more information see the associated Festo SE & Co. KG security advisory FSA-202202 FSA-202202: Festo: Controller CECC-S,LK,D family <= 2.3.8.1 - multiple vulnerabilities in CODESYS V3 runtime system - HTML, FSA-202202: Festo: Controller CECC-S,LK,D family <= 2.3.8.1 - multiple vulnerabilities i…

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof of concept: PoC-in-GitHubno public repository identifiedread 2026-11-08
Metasploit modules: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
CNACVSS 3.07.5known since 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-119known since 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score2.6 %2026-11-08
GitHub Advisoriesadvisory—

Identifiers

EUVD-2019-14710same flawENISA EUVD · LicenseRef-ENISA-legal-notice
GHSA-fhfx-4gh6-9wc2same flawGitHub Advisory Database · CC-BY-4.0

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2020-03-26
Last Modified: 2026-06-17
NVD status: Modified
GitHub Advisory: GHSA-fhfx-4gh6-9wc2

Frequently asked questions

What is CVE-2019-5105?

Is CVE-2019-5105 actively exploited?

Active exploitation of CVE-2019-5105 has not been confirmed. Its EPSS score was 2.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-5105?

CVE-2019-5105 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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