CVE-2011-4871 json
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…
published 2012-04-18 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4788
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.1%
- EPSS 3.1% chance of exploitation in 30 days, percentile 87%
- public exploits
- 1
- Exploit-DB
Summary
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.
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-12-012-01A updated cvss 5.0
Open Automation Software OPC Systems.NET Vulnerability
-
Open Automation Software OPC Sytems.NET <5.0affected: mitigation
From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf
Timeline
- First public exploit (EDB-17965)
- Published
Exploit prediction
3.12% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- EDB-17965 OPC Systems.NET 4.00.0048 - Denial of Service dos, 2011-10-10
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
us-cert.gov
/control_systems/pdf/ICSA-12-012-01.pdf
us-government-resource
Sources
- CVE List CVE-2011-4871
- NVD CVE-2011-4871
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.