Medium severity · published Sep 14, 2026
CVE-2026-82773
Cross-site scripting vulnerability exists in CONPROSYS M2M Gateway Series and CONPROSYS M2M Controller Series
6.1
CVSS
0.3%
EPSS
No
On KEV
Description
Cross-site scripting vulnerability exists in CONPROSYS M2M Gateway Series and CONPROSYS M2M Controller Series. If this vulnerability is exploited, an arbitrary script may be executed on a logged-in user's web browser.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 18% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MC
M2M Controller Configurable type CPS-MCS341* · Contec Co., Ltd.
before 4.1.0 · source: vendor
MC
M2M Controller Integrated Type CPS-MC341 · Contec Co., Ltd.
before 4.1.0 · source: vendor
MG
M2M Gateway Configurable type CPS-MGS341* · Contec Co., Ltd.
before 4.1.0 · source: vendor
MG
M2M Gateway Integrated Type CPS-MG341* · Contec Co., Ltd.
before 4.1.0 · source: vendor
Affected product
MC
M2M Controller Configurable type CPS-MCS341*
Contec Co., Ltd.
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82773
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82773
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
More from M2M Controller Configurable type CPS-MCS341*
8.8
CVE-2026-82774
Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in CONPROSYS M2M Gateway Series and CONPROSYS M2M Controller Series
4.3
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An exposure of information through directory listing issue exists in CONPROSYS M2M Gateway Series and CONPROSYS M2M Controller Series