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Vulnerability record · CVE-2023-28831 · published 12 September 2023

CVE-2023-28831: Siemens simatic cloud connect 7 cc712 firmware integer overflow vulnerability

Siemens · Simatic Cloud Connect 7 Cc712 Firmware

The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation. This could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate.

8.7 CVSS 4.0 High EPSS 1.1% · top 34.9% CWE-190 · Integer overflow
8.7CVSS 4.0 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
78Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

The OPC UA implementations (ANSI C and C++) in affected products contain an integer overflow vulnerability that could cause the application to run into an infinite loop during certificate validation. This could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

78 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/html/ssa-118850.html MitigationVendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-711309.html MitigationVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-118850.pdf MitigationVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-711309.pdf Vendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-118850.html MitigationVendor Advisory
https://cert-portal.siemens.com/productcert/html/ssa-711309.html MitigationVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-118850.pdf MitigationVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-711309.pdf Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-28831), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.