CVE-2011-4871
Open Automation Software OPC Systems.NET before 5.0 allows remote attackers to cause a denial of service via a malformed .NET RPC packet on TCP port 58723.
Does this matter?
A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 3.1%. Treat it as high on anything reachable from the internet.
Description
Open Automation Software OPC Systems.NET before 5.0 allows remote attackers to cause a denial of service via a malformed .NET RPC packet on TCP port 58723.
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 3.12% probability · 88th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 10 October 2011
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- opcsystems/opcsystems.net
- Source
- cret@cert.org
EPSS 3.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.us-cert.gov/control_systems/pdf/ICSA-12-012-01.pdfUS Government Resource
- http://www.us-cert.gov/control_systems/pdf/ICSA-12-012-01.pdfUS Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.