CVE-2026-82785

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-14 · updated 2026-09-16
Weakness: CWE-121

Description

Stack-based buffer overflow vulnerability exists in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*. 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. Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*: before 1.82 — fixed in 1.82

How to fix

Upgrade to a fixed version: Contec Co., Ltd. Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* 1.82. Check the vendor advisory for mitigations.

References

https://jvn.jp/en/vu/JVNVU96551518/
https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_cps_26091000_en.pdf

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