Vulnerability · Published Sep 14, 2026 · Assigned by jpcert
CVE-2026-82782
Medium 4.3
In plain English
A medium-severity out-of-bounds write in Programmable Remote I/O Coupler Unit (Software PLC Type) CPSN-PCB271-S1-041 from Contec Co., Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.5%top 60.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Out-of-bounds write vulnerability exists in CONPROSYS nano Series. Receiving a specially crafted request created and sent by a remote attacker may cause a denial-of-service (DoS) condition.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Contec Co., Ltd. | Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* | 0 – before 1.82 |
| Contec Co., Ltd. | Remote I/O Coupler Unit (EtherNet/IP Adapter) CPSN-EOB471EI-[]1 | 0 – before 1.02 |
| Contec Co., Ltd. | Programmable Remote I/O Coupler Unit (Software PLC Type) CPSN-PCB271-S1-041 | 0 – before 1.61 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L