CVE-2011-4871

Opcsystems.Net vulnerability

CVSS

5.0

EPSS

3.2%

EPSS pct

87th

Exploited

No known

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.

Affected vendor

Opcsystems

Affected product

Opcsystems.Net

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2012-04-18

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 3.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2011-4871

Confirm whether Opcsystems Opcsystems.Net is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2011-4871.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-4871

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-4871 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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