CVE-2026-3509 | CODESYS Control RTE prior 3.5.22.0 format string (VDE-2026-018 / EUVD-2026-14784)

VDB-352704 · CVE-2026-3509 · VDE-2026-018 CODESYS CONTROL RTE PRIOR 3.5.22.0 FORMAT STRING HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.3 $0-$5k 5.59+ Summaryinfo A vulnerability, which was classified as critical, was found in CODESYS Control RTE, Control RTE SL, Control Win, Runtime Toolkit, Control for BeagleBone SL, Control for emPC-A, iMX6 SL, Control for IOT2000 SL, Control for Linux ARM SL, Control for Linux SL, Control for PFC100 SL, Control for PFC200 SL, Control for PLCnext SL, Control for Raspberry Pi SL, Control for WAGO Touch Panels 600 SL and Virtual Control SL. Affected by this vulnerability is an unknown functionality. The manipulation results in format string. This vulnerability is cataloged as CVE-2026-3509. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component. Detailsinfo A vulnerability, which was classified as critical, was found in CODESYS Control RTE, Control RTE SL, Control Win, Runtime Toolkit, Control for BeagleBone SL, Control for emPC-A, iMX6 SL, Control for IOT2000 SL, Control for Linux ARM SL, Control for Linux SL, Control for PFC100 SL, Control for PFC200 SL, Control for PLCnext SL, Control for Raspberry Pi SL, Control for WAGO Touch Panels 600 SL and Virtual Control SL. Affected is some unknown functionality. The manipulation with an unknown input leads to a format string vulnerability. CWE is classifying the issue as CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. This is going to have an impact on availability. CVE summarizes: An unauthenticated remote attacker may be able to control the format string of messages processed by the Audit Log of the CODESYS Control runtime system, potentially resulting in a denial‑of‑service (DoS) condition. The advisory is shared for download at certvde.com. This vulnerability is traded as CVE-2026-3509 since 03/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. Upgrading to version 3.5.22.0 eliminates this vulnerability. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14784). Productinfo Vendor CODESYS Name Control for BeagleBone SL Control for emPC-A Control for IOT2000 SL Control for Linux ARM SL Control for Linux SL Control for PFC100 SL Control for PFC200 SL Control for PLCnext SL Control for Raspberry Pi SL Control for WAGO Touch Panels 600 SL Control RTE Control RTE SL Control Win iMX6 SL Runtime Toolkit Virtual Control SL License commercial CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.4 VulDB Meta Temp Score: 6.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.5 CNA Vector (CERTVDE): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Format string CWE: CWE-134 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Control RTE/Control RTE SL/Control Win/Runtime Toolkit/Control for BeagleBone SL/Control for emPC-A/iMX6 SL/Control for IOT2000 SL/Control for Linux ARM SL/Control for Linux SL/Control for PFC100 SL/Control for PFC200 SL/Control for PLCnext SL/Control for Raspberry Pi SL/Control for WAGO Touch Panels 600 SL/Virtual Control SL 3.5.22.0 Timelineinfo 03/04/2026 CVE reserved 03/24/2026 +20 days Advisory disclosed 03/24/2026 +0 days VulDB entry created 03/24/2026 +0 days VulDB entry last update Sourcesinfo Advisory: VDE-2026-018 Status: Confirmed CVE: CVE-2026-3509 (🔒) GCVE (CVE): GCVE-0-2026-3509 GCVE (VulDB): GCVE-100-352704 EUVD: 🔒 Entryinfo Created: 03/24/2026 09:42 Updated: 03/24/2026 10:32 Changes: 03/24/2026 09:42 (63), 03/24/2026 10:32 (1) Complete: 🔍 Cache ID: 99:E84:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸