Description
A CWE-248: Uncaught Exception vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service when reading memory blocks with an invalid data size or with an invalid data offset in the controller over Modbus.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Modicon M580 Modicon M340 Modicon Quantum Modicon Premium | Modicon M580 Modicon M340 Modicon Quantum Modicon Premium | — |
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.
GitHub 1 repository
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yanissec/CVE-2018-7843 ★ 0 · Oct 18, 2023
CVE-2018-7843
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- SEVD-2019-134-11 Multiple Vulnerabilities in Modicon Controller Products Schneider Electric CPCERT · Sep 8, 2026
- ICSA-25-114-01 Schneider Electric Modicon Controllers (Update A) CISA ICS & IT advisories · Apr 23, 2026