CVE-2011-4871 describes a denial-of-service vulnerability in Open Automation Software OPC Systems.NET versions prior to 5.0. An unauthenticated remote attacker can exploit this by sending a malformed .NET RPC packet to TCP port 58723, causing the affected system to become unavailable. With a CVSS score of 5.0 (medium severity), this vulnerability is easily exploitable over the network with low attack complexity and no authentication required, leading to a partial availability impact. While not listed in CISA's KEV catalog, a public exploit (EDB-17965) exists, though there is no evidence of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.0CPE matchmatch criteria | cpe:2.3:a:opcsystems:opcsystems.net:*:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P
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The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.