Description
Multiple stack-based buffer overflows in ModbusDrv.exe in Schneider Electric Modbus Serial Driver 1.10 through 3.2 allow remote attackers to execute arbitrary code via a large buffer-size value in a Modbus Application Header.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 2
- SEIG Modbus 3.4 - Denial of Service (PoC) EDB-45219 · dos · Aug 20, 2018
- SEIG Modbus 3.4 - Remote Code Execution EDB-45220 · remote · Aug 20, 2018
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- ICSA-14-086-01A Schneider Electric Serial Modbus Driver Buffer Overflow (Update A) CISA ICS & IT advisories · Jun 25, 2025