CVE-2026-82782: Contec Co., Ltd Programmable Remote I/o Coupler Unit Software PLC Type Cpsn-PCB271-s1-041

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

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

• Contec Co., Ltd Programmable Remote I/o Coupler Unit Software PLC Type Cpsn-PCB271-s1-041: before 1.61 (fixed in 1.61)
• Contec Co., Ltd Remote I/o Coupler Unit Ethernet/ip Adapter Cpsn-EOB471EI-1: before 1.02 (fixed in 1.02)
• Contec Co., Ltd Remote I/o Coupler Unit Server Type Cpsn-MCB271-*: before 1.82 (fixed in 1.82)

Published 2026-09-14. Last modified 2026-09-16.