Medium severity · published Sep 14, 2026
CVE-2026-82785
Stack-based buffer overflow vulnerability exists in Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*
4.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RI
Remote I/O Coupler Unit (Server Type) CPSN-MCB271-* · Contec Co., Ltd.
before 1.82 · source: vendor
Affected product
RI
Remote I/O Coupler Unit (Server Type) CPSN-MCB271-*
Contec Co., Ltd.
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82785
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82785
jvn.jp
https://jvn.jp/en/vu/JVNVU96551518/
www.contec.com
https://www.contec.com/api/downloadlogger?download=/-/media/Contec/support/security-info/2026/contec_security_cps_26091000_en.pdf
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