CVE & CISA-KEV CatalogNVD
CVE-2023-28831
HIGH7.5
CVSS v3
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.
How to fix
Remediation Available
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siplus et 200sp cpu 1512sp-1 pn firmwareNVD
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siplus et 200sp cpu 1512sp f-1 pn firmwareNVD
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siplus s7-1500 cpu 1511-1 pn firmwareNVD
siplus s7-1500 cpu 1511-1 pn t1 rail firmwareNVD
siplus s7-1500 cpu 1511-1 pn tx rail firmwareNVD
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siplus s7-1500 cpu 1513-1 pn firmwareNVD
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siplus s7-1500 cpu 1515f-2 pn firmwareNVD
siplus s7-1500 cpu 1515f-2 pn rail firmwareNVD
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siplus s7-1500 cpu 1515r-2 pn firmwareNVD
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siplus s7-1500 cpu 1516f-3 pn\/dp firmwareNVD
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siplus s7-1500 cpu 1517h-3 pn firmwareNVD
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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
0.82%probability of exploitation in 30 days
53rdpercentile
Moderate risk: more likely to be exploited than 53% of all known CVEs.
References
Related Vulnerabilities
Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2020-16040 | Medium | 6.5 | 100% | - | Fix |
| CVE-2019-11477 | High | 7.5 | 99% | - | Fix |
| CVE-2023-44443 | High | 7.8 | 94% | - | Fix |
| CVE-2014-0569 | High | 9.3 | 90% | - | - |
| CVE-2017-3599 | High | 7.5 | 90% | - | Fix |
| CVE-2023-21716 | Critical | 9.8 | 82% | - | Fix |
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Markdown
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-08-18.