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Vulnerability · Published Dec 1, 2025 · Assigned by CERTVDE

CVE-2025-41739CODESYS Control - Linux/QNX SysSocket flaw

Medium 5.9

In plain English

A medium-severity out-of-bounds read in CODESYS Control for BeagleBone SL from CODESYS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.4%top 68.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

An unauthenticated remote attacker, who beats a race condition, can exploit a flaw in the communication servers of the CODESYS Control runtime system on Linux and QNX to trigger an out-of-bounds read via crafted socket communication, potentially causing a denial of service.

Affected products (as reported)

VendorProductVersions
CODESYS CODESYS PLCHandler 3.5.21.0 – before 3.5.21.40
CODESYS CODESYS Remote Target Visu 3.5.21.0 – before 3.5.21.40
CODESYS CODESYS Runtime Toolkit 3.5.21.0 – before 3.5.21.40
CODESYS CODESYS Control for BeagleBone SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for emPC-A/iMX6 SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for IOT2000 SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for Linux ARM SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for Linux SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for PFC100 SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for PFC200 SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for PLCnext SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for Raspberry Pi SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Control for WAGO Touch Panels 600 SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Edge Gateway for Linux 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS TargetVisu for Linux SL 4.15.0.0 – before 4.19.0.0
CODESYS CODESYS Virtual Control SL 4.15.0.0 – before 4.19.0.0

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References